never it is only on xbox 360
It depends if your xbox is fast or slow!
Yes. As long as you modded it right
If a game is out of date, the Xbox will prompt you to download the latest update for it. Updates are usually around 4MB and do not take long to download.
7 months
It really depends on your internet speed.
Depending on the game and size and how good a connection you have
Sadly, you cannot. you have to log on to xbox live to be able to download xbox original or arcade games. you can however buy xbox original games as long as you have a hard-drive.
It honestly depends on the memory that your Xbox has and your internet connection. 6.86gb will download faster on an Xbox that has 250gb and great internet connection, than an Xbox with 20gb and poor internet connection.
Nope, just as long as you don't have to download it.
As long as you have an XBox LIVE connection, the dashboard update should start automatically when you turn your 360. If not, you might not have XBox LIVE, or just aren't connected to it. If you are, though, try to get support.
It will take several hours as the game will be many many GB.