Yes.
No, and if it was possible what would be the point of buying and Xbox 360 anyways, besides the point of live? You can play a lot of regular Xbox games on the Xbox 360.
Yes you can. All versions of the xbox 360 are compatible.
if you have a hard drive you can play the xbox game's
You can play many regular Xbox games on the Xbox 360.
I don't think the games are reverse playable
if by modded you mean a flashed then yes but evan if you are playing official xbox 360 games you can still get banned from xbox live
no. you need an xbox 360. not a regular xbox to play 360 games.
no
yes the xbox itself will play regular dvds
I don't think that you can play an original Xbox game on an Xbox 360 live. But some games from the old xbox you can play on Xbox 360.
Yes, my cousins have an Xbox 360 and they have halo one and two for regular xbox and they play it on their xbox
you can not because xbox live has stopped supporting the normal xbox not 360