I've become a fan of the new series, but I was wondering with the whole regeneration thing, does the Doctor have an x number of years he can live in one body until he regenerates again? Or is he just die hard with all of his lives so that he's lived longer in one regeneration than the other?

He lives for as long as the BBC can convince the actors to stay

Its a horribly bad show which is fun to watch because its bad to the point of campy fun. The sfx are only beaten by the cinematography and costume design for lack of professionalism.

Star Trek does everything the new series does better; and i dont even Like it,

If/when im in on a saturday night i watch it

That didn't answer my question, and it's also a very pathetic answer.

Yes it did. He dies after however long the actor is willing to play him. This time hes lived for all of one year.