Ok so, in the season 1 episode The Dalek when the Doctor confronts the Dalek he says that he made them burn, then says that the Time Lords burned with them... so in killing the Daleks did he in fact kill his own entire race?
Dalek: [scared] Keep back!
The Doctor: [the Doctor confronts the Dalek] What for? What're you going to do to me? Because if you can't kill, then what are you good for... Dalek? What's the point of you? You're nothing! What are you doing here? What the hell are you here for?
Dalek: I am waiting for orders.
The Doctor: What does that mean?
Dalek: I am a soldier, I was bred to receive orders.
The Doctor: Well, you're never going to get any. Not ever.
Dalek: I DEMAND ORDERS!
The Doctor: Well they're never gonna come! Your race is dead! You all burned, all of you. Ten million ships on fire. The entire Dalek race, wiped out in one second.
Dalek: You lie!
The Doctor: I watched it happen. I made it happen!
Dalek: You destroyed us?
The Doctor: [the Doctor walks away from the Dalek] I had no other choice.
Dalek: And what of the Time Lords?
The Doctor: [pause] Dead. They burnt with you. The end of the last great Time War. Everyone lost.