To answer your questions:
1) Yes it was a Super Saiyan form. But the Saiyans call it a "Super Level/Form".
2) Uub and Gohan are about 14 or 15 at the story's start.
3) This is in a completely alternate universe, so the events of Dragon Ball, DBZ, and DBZ GT never happened.
Episode 002: Vegeta the Hunter
Frieza Cold sat in his floating throne, when a Raidanian Minion appeared.
"Lord Frieza, you called for me?" he asked.
"Yes. Send a message to the Hunters. Hire their best group to kill those little rats who killed Cui and Appule," Frieza.
"Who would that be?" the minion asked.
"Prince Vegeta, of course," Frieza replied with a grin.
Gohan and Uub ventured through long peaceful plains, the Land of Tranquility, with two new allies beside them. One was Gohan's sister, a young girl with short black hair covered by an orange bandanna. She wore a red shirt and fingerless gloves, with jeans. This was Pan. The next was a man dressed in an orange karate gi, with long and shaggy black hair. This was Gohan's "Uncle" Yamcha. He wasn't really his uncle, or even family, but he had taken care of Gohan and Pan since they were kids, when their parents had been killed by Frieza.
"So, the Elder knows how to revive Krillin?" Yamcha asked.
"Yeah, and that's why we have to find him. Only he knows where the Dragon Balls are," Uub said.
"Dragon Balls?" Pan asked.
"They are mystical stones with the images of stars painted on them. They hold the power of a mystical dragon, known as Shenron, the Eternal Dragon. Shenron is one of the most powerful entities alive, but he is sealed in the Dragon Balls. When all seven are together, you can summon him to grant any one wish," Yamcha explained.
"Then we need to find them. I'm sure Frieza wants them as well," Gohan said as they continued to the Elder's House.
On a spaceship far out in space, a brown-haired king with a thick goatee sat at a throne. He wore royal armor and a long cape, and the Saiyan Royal Family's crest was on the chest of it. A sword sat at the side of his throne. This was the Saiyan King.
A large monitor, like a television set, came down and showed the image of the Raidanian minion of Frieza.
"King Vegeta, Lord Frieza has need of your son's services," the minion said.
"Then why doesn't the runt ask himself instead of sending a grunt?" the King asked.
"You know what will happen if you disrespect Lord Frieza, Vegeta. Now, where is your son?" the minion said.
"Turn that stupid monitor around and you'll see!"
A man with black hair spiked up appeared. He wore a blue jumpsuit beneath a set of chest armor. This was Prince Vegeta the Second.
"Lord Frieza has an assignment. Take your crew down to the planet Earth and find these two Earthlings: Son Gohan and Uub," the Raidanian said as the monitor showed an image of Gohan and Uub.
"Tell him I accept the job," Vegeta said as he turned and left the room, heading down the hall as he reached a training room.
One was a man with black hair. He wore the same armor as Prince Vegeta. Farther away a bald Saiyan in larger armor and a goatee stood, charging his energy. A long-haired boy in similar armor stood to the side.
"Hey, you slackers, we've got an assignment. Get off your lazy rear-ends and prepare to ship out," Vegeta said as they all got up and walked to the docking bay, sliding into the pods, flying away.
Uub, Gohan, Yamcha, and Pan continued on their journey, when farther off, the Saiyan Space Pods landed. The doors opened and the team of Saiyans appeared.
"I'm detecting four power levels due south," the bald one said.
"We can all see that, Nappa, our Scouters aren't broken!" the long-haired one said.
"Shut up Raditz, before I burn a hole through your head!" Nappa said.
"Why don't both of you shut up?! Kakarot, go scout ahead and ambush them. We'll set up a perimeter and each take one," Vegeta said.
The ordinary-looking Saiyan, Kakarot, nodded and walked off. When he reached a hill, he pressed a button on his scouter.
On Gohan, his Power Level was marked as 650, but he could see a second aura deeper in him.
"Either he's hiding something, or my Scouter is broken," Kakarot thought.
Uub's Power Level was marked as 655, almost equal to Gohan. Yamcha's read as 475, despite being an adult. Pan's was listed as 555.
"I'll knock down that one," Kakarot said as he created a ring of energy, shooting it at Yamcha as the quartet was shot back.
"It's an ambush!" Yamcha said as another one of these attacks, a Kill Driver, appeared.
Yamcha jumped up and saw Kakarot, ready to use another. Pan, Uub, and Gohan went to run in the other direction, but a purple blast of energy hit Uub in the chest. Raditz appeared and slammed into Uub, while Vegeta and Nappa appeared to block Gohan and Pan.
"Which one do you want?" Nappa asked.
"I'll take the boy, you can do whatever you want," Vegeta said.
Nappa popped his knuckles and in a flash, Pan was launched back by a wave of energy. Vegeta and Gohan clashed as their energies increased.
Vegeta started to pound at Gohan rapidly, placing a hand on his stomach as a wave of energy hit the boy. Meanwhile Yamcha moved into a fighting stance, his patented Wolf Style, and struck at Kakarot wildly. Kakarot hit Yamcha in the chest with a Kill Driver, pushing him back. Kakarot rushed down and lifted Yamcha into the air, pounding him brutally before throwing him on teh ground, blasting him with a wave of energy. Yamcha passed out after the last hit.
Nappa lifted Pan into the air and punched at her wildly, pushing her back before backflipping and kicking her away. She was launched into a rock and sped at Nappa, slapping him around.
"How does it feel to be beat by a girl?!" she asked before flying into the air, shooting two waves of energy at Nappa.
"I guess I'll never learn!" Nappa shouted as he caught the two attacks in his left hand, crushing it before he closed his fist, causing a blue explosion to surround Pan as she fell to the ground, unconscious.
Uub and Raditz clashed, striking each other wildly. Uub kicked Raditz in the jaw, pushing him back before his hands glowed red.
"Flaming Fist Strike!" Uub shouted as he slammed his flaming palms into Raditz, pushing the Saiyan back before he kicked him aside.
"Here's a present!" Raditz said as he shot a blast of purple energy at UUb, hitting him in the shoulder.
Uub fell and grabbed his shoulder, giving Raditz time to attack. The long-haired lifted Uub into the air and pounded away at him rapidly before slamming him into the ground.
"Uub! I'll make you pay!" Gohan shouted before charging at Vegeta.
Gohan kicked at Vegeta, but the Saiyan Prince blocked it and shot a Ki Wave at Gohan, but he jumped away and put his palms together, charging golden energy into his hands.
"Masenko-HA!" he shouted as a beam of golden energy slammed into Vegeta, pushing him back.
"If that's how you want to play it, I'll use my Galick Gun!" Vegeta said as he shot a blast of purple energy, pushing back the Masenko.
"Wild Masenko!" Gohan shouted as he fired a barrage of Ki Waves into the struggling beams, which exploded. Both were pushed back.
Gohan, injured, fell to his knees in pain. He looked and saw his wounded friends. He rose and energy surrounded him.
"I won't let it end here! I'll destroy you if you touch my friends!" Gohan shouted as a golden aura surrounded him again.
His hair spiked up and Gohan screamed as his Ki took over.
"What just happened? No human should be able to do that!" Nappa said.
"It's impossible!" Raditz said.
"Nothing is impossible," Kakarot commented.
"If that's how you want to play it, I'll even the playing field!" Vegeta said as his hair spiked up and turned golden, while a sparking aura surrounded him.
"Still think you can beat me?' he taunted.
Gohan charged at Vegeta and kicked him in the chest, launching him into a rock.
"You shouldn't have done that, kid," Vegeta said before he and Gohsn disappeared in a flash.
In random parts of the air, energy exploded where the two invisible warriors clashed. Gohan was slammed into the ground, but disappeared in a flash. A tree was blown away by their energy, and a Vegeta-sized hole appeared in the ground. Suddenly, the two appeared, struggling against each other's power.
"For a kid, you're pretty tough," Vegeta said.
"And for an adult, you're pretty fast," Gohan said.
"Let's end this!" Vegeta said, jumping back as he charged up his energy.
Gohan charged his energy and shot a wave of energy at Vegeta. Vegeta, in response, shot a single wave of blue energy from his right hand.
"Take this!" he shouted as he shot a sphere of blue energy into the beam, growing larger as it absorbed the attacks and slammed into Gohan, ripping apart the gi he wore on his chest and knocking him out, turning him back to normal.
"Is he dead?" Nappa asked.
"No, I just knocked him out. He's coming with us. Raditz, you pick him up. Leave the rest," Vegeta ordered as he turned to leave.
"Gohan..." Uub said, stretching out to attack, but Nappa saw this and kicked him in the ribs, launching him back.
"Don't worry, your friend won't be injured. We just need to test something. Just stay here, and we'll try to bring him back," Kakarot said to Uub before turning and leaving.
Back in his Space Pod, Vegeta sent a message to his father.
"Son, what do you want?" he asked.
"We have found an interesting Earthling. He can reach his Super Form, just like my squad and the rest of the Hunters," Vegeta explained.
"Which one is it? The Great Ape, or the Ascended Level?" the King asked.
"The same as mine. The Ascended Level," Vegeta replied.
"That is impossible, only Saiyans can reach the Ascended Level," the King said.
"We saw it with our own eyes. We're bringing the human back to our ship for a check-up," Vegeta said.
"Then we shall decide whether to let him live, or destroy this boy," the King said.