The best guess I've seen for this is:

I woke up in the city in a bit of a rage
Determined 2 free my mind from this art official cage
Tought by tought my teachers taught from an early age
A place in heaven far off in the future

But "tought" is not in Merriam Webster's or even referenced credibly in the urban dictionary for slang which Prince often uses. And it's unusual for Prince to be unnecessarily redundant, given that he does have a remarkable vocabularly. So "tot by tot" (child/student by child/student) seems to make a lot more sense in this context.

I woke up in the city in a bit of a rage
Determined 2 free my mind from this art official cage
Tot by tot my teachers taught from an early age
A place in heaven far off in the future

Any better suggestions?

[Edited 2/17/16 20:53pm]

"Taught by Thought"

As in they Taught me with their Thoughts...

.

[Edited 2/17/16 22:42pm]

luv2tha99s said:

Thought by thought, maybe.

I hear that too, "thought by thought my teachers taught"

Taught by his teachers one thought at a time.

got my,got my future stock from an early age

"I woke up in the city in a bit of a rage

Determined to free my mind from this artificial cage

Doctor, doctor if you start from an early age

a place in heaven far off in the future"

Originally I kept hearing "doctor, doctor".