Mac OS X is supplied on a DVD with every new Mac. Upgrades to new versions of Mac OS X can be purchased from any retailer that stocks Apple software such as Amazon.
You'll have to get a specific version available on the Mac OS X platform, unless the CD that came with the CD says it also works on OS X (such as Spore).
An OS CD is a disc that contains the Operating System and from which you can install a fresh copy of the OS onto your computer. A modern OS is likely to come on a DVD rather than a CD.
You can buy the Leopard install CD and follow the instructions.
Yes; either directly via the CD/DVD drive or via a Mac compatible portable CD/DVD player.
You cannot without erasing your hard drive and installing Mac OS 9 from scratch. Even then Mac OS 9 may not run on modern Mac hardware because Mac OS 9 needs the ROM chip to boot. Modern Mac OS X hardware uses EFI to boot the system instead of a ROM chip to boot. Mac OS X v10.0 - Mac OS X v10.4 support Mac OS 9 applications and can run them, you just need to install the Mac OS 9 compatibility program which can be found on the Mac OS X Install CD.
Download an ISO of the Mac OS CD, and then burn that ISO with Nero to the CD. It will be an exact copy of that disc. If the ISO was copied from a bootable CD then the copy you burn will be bootable.
Linux can be booted from a floppy or a CD, although very few modern distros are actually booted or installed from floppies. Mac OS X cannot be booted or installed from a floppy; the last version of the Mac operating system that could be reasonably booted from a floppy was System 6. Mac OS X versions up to 10.4 could be installed with CDs; 10.5 and later require a DVD.
Apple's Mac OS X. OS X Lion OS X Panther OS X Leopard etc.
The second name of Mac OS X v10.4.5 is Mac OS X v10.4 Intel.Mac OS X 10.4 was known as Mac OS X Tiger.
There are two Firm Suggestions currently; OS X Saber tooth or OS X Cougar
I have a Windows Vista OS and a Windows 7 OS and I don't need one to play. I'm not so sure about other opperating systems below Vista.
Mac OS X 10.4 (Tiger) needs to be purchased as it is not possible to update from Mac OS X 10.2.8