There are no useful Xbox emulators in existence, and none that run on Mac OS X. One can play Halo decently, and the other can play Turok. You can download the emulators from their respective websites. No games are provided.
No.
There are several emulators to run other systems software on Windows, but there is nothing decent (as in working reliably with any software) for running Mac OS X software on Windows.
Yes. DeSmuME is available for Mac OS X.
Boxed versions of Mac OS X do not include the iLife suite which is available separately.
A legitimate copy of Mac OS X 10.4 will only be available to buy.
µTorrent is available for the Mac. (See links below)
Mac OS X is one of the major releases of operating systems from Apple Inc. It features a low level Mach_kernel, underlying Unix OS, a 3D graphical user interface. Mac OS X can only be installed on computers made by Apple Inc. Recent versions of Mac OS X include: Mac OS X 10.3 Panther, Mac OS X 10.4 Tiger, Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard. Starting in Mac OS 10.5 an automatic backup utility called Time Machine is available. The current version is Mac OS X 10.10 and an early release version of Mac OS X 10.11 is available to install.
Currently, it's $129 dollars (Mac OS X Leopard). Once Snow Leopard is available (August 28), it will be a $30 dollar upgrade from Mac OS X Leopard.
Sims 3 is available for Mac OS X. You will have to buy a mac specific disc though.
The Photobooth software requires Mac OS X 10.5 (Leopard) or higher and is not available for Mac OS X 10.4 (Tiger).
Yes. It's available for Windows and Mac OS.