The Mac Store is an online store that sells both the Power Mac G5. They sell the PCI-E, PCI-X, and PCI towers. They also sell a variety of Power Mac G4 Towers.
No the architecture is completely different on the bus.
Yes, it can, if it has Mac OS X running
From the Apple menu (top left corner) select About This Mac. From the About This Mac window that appears click the More info... button. In the Hardware section you can find the Model Identifier (eg PowerMac 6,4) in the Hardware Overview.
Depends on the Store you are buying it from
The PowerMac G3 was a Macintosh computer that appeared in 1997 and was discontinued in 1999. The G3 refers to the PPC processor. It was subsequently followed by the G4, G5 and then the Intel processor based Macs. It would have limited use today being unable to run the latest versions of Mac OS X.
The best place to buy Parallels for a Mac computer would be on the Parallels website. Another trusted place online to buy Parallels would be on Amazon.
You buy it for mac. You can get it at a mac store.
The g5 power-mac is a desktop created by Apple. If you were looking towards purchasing one the prices range anywhere from 70 dollars to 300 dollars you might find a few cheaper used.
Buy a new mac
You buy it.
Someone would buy OSX86 if they wanted to turn their current PC into a computer that runs MacOS. They would do that if they didn't want to pay the high price for the Mac, but liked MacOS.
From the internet or the MAC store