On the new series of Doctor Who, the Time War is classified as the conflict between the Time Lords and the Daleks. It spanned across the universe and even across Time itself. The conclusion of this war wiped the Time Lords from history, save for one; the Doctor. The Daleks were supposedly destroyed in the same mysterious ending maneuver, but it is shown throughout the series that at least a few survived.
no
Yes
Yes.
The Time War.
It happened before, the time war (probably) resulted in the eighth Doctor regenerating into the ninth, who kicked off the new series.
The BBC have said that will leave the time war open to fan's interpretation, instead of it being interpreted for them.
The Time War has not been shown as of yet, but luckily there shall be a flash back in one of 2009's specials, which show a small bit of the Time War.
Gallifrey was destroyed in the Last Great Time War.
No, but he doesn't like to harm anything or anyone after what happened in the time war.
The eighth Doctor regenerated offscreen and nothing is known about how or why he regenerated. The eighth Doctor appeared onscreen only once in a TV movie. We know th Time War happened between the TV movie and the start of the 2005 series. It's widely assumed that whatever the Doctor did to end the Time War caused him to regenerate.
The Doctor In War has 481 pages.
The Doctor In War was created in 1918-11.