I think it was a late 70's or early 80's weekly show. I think he live with an old man who helped him learn how to use his powers.

I remember the show and he was a sorcerers apprentice.

That is who the old man was. Can't remember the name but will go search for it.

It was called Mr Merlin.

"Mr. Merlin" (1981) (http://www.imdb.com/title/tt0081903/)