Where can I get one of FCP.
Not sure what you're asking.
Just to re-phrase my comments: I connect a VHS deck to a converter box (something like this) via an analogue connection into the converter. The converter has Firewire out which goes to the capture drive.
Actually, you may not need to buy anything at all. Many mini DV cameras have a pass through capability that allows you to run a composite in and Firewire out. Not sure that it's the "best" way, but if your camera supports this, give it a try.
Depending on how how much editing you intend to do on the digitized footage, Quick Time Pro (7 not X) would be an alternative to Final Cut.
Good luck with your project.