[@Eyeris] Sorry for pushing. I was trying to keep it at a maximum of once a week.

Equestria is more like how fairy tales portray kingdoms with a few modern things thrown in here and there. However, Equestria isn't important to Rockin'. Coltrea is more of a clash of a lot of eastern stereotypes.

Being a unicorn, he has an innate ability to use magic.

Teleportation: Up to 50 meters.
Levitation of objects: Nothing larger than a cow. The more mass an item has, the more magic it takes to move it. It's more like how he holds things since he has hooves instead of hands.
Cloud walking: The only advanced spell he knows. With this, he can walk on clouds as easily as on land.
Flying: The combination of his metal wings and levitation magic. 

Because he is a unicorn, magic is innate, just like flying is to pegasi. He chose to learn music and the guitar is his preferred instrument. He's naturally intelligent and shows this through his inventions. His "role" would be bard. Inventive musician. 

The legend says that the decendants of the two oldest clans will continue the age old war between the elements of Life and the elements of Death. That has nothing to do with the current point of his story. He doesn't care about it. 

Any other questions? 

Edit: Think of it this way: born with magic because of his race, a gifted inventor but doesn't really work on his inventions much, loves his music and strives to perfect it.