No, you have a Mac Mini using the Power PC G4 processor. Only a Mac running the Intel Processor can run 10.6.8 Snow Leopard. You can however install 10.5.8 Leopard on your Mac Mini.
http://www.apple.com/mac-mini/
Mac Mini was created on 2011-07-20.
You cannot put a Mini Disc physically into a Mac. You can connect a Mini Disc player to the Mac and listen to it through some audio software.
No. The graphics "card" in a Mac mini is integrated into the motherboard. There are also no available expansion slots in a Mac mini. You can see some photos of the inside of a Mac mini in the "Related Links" link below.
A Mac Mini is a computer. It can be used with any screen and keyboard.
Mac
10.6.x is no longer actively supported by Apple on anycomputer now so they will not be able to help you even if your mini is supported. If you have any problems the Apple forums are there to help.
Yes!
You can use any monitor for the mac mini as long as it has either a Thunderbolt, HDMI or DVI port.
yea
Please specify what you mean by "What": hardware? software? periphs? This is a general questions. I have a Mac Mini that works with all general hardware and software made for Mac.
Mac Pro memory upgrades can be downloaded direct from the Apple site. There are several third party resellers who also purport to sell memory upgrades but care should be taken when downloading form an unknown site to be wary of malware.