The Doctor relaxed agaisnt his pillows "Yeah I suppose thats one way to look at it, when one body is used up and would otherwise die, timelords can change every cell in their body and become a different person almost to cheat death I suppose, But it means we don't really age and just live on, and being the last... well makes it worse." He explained. " Sometimes I feel like its a curse and that I have lived too long."
"A Timelord usually has a set amount of regenerations, when they are used up then we die, though if my planet and people was still around I could get more regenerations."