http://www.ehow.com/how_4466056_connect-video-camera-mac.html
Step two shows a picture of a four pin firewire port. It is likely that this is the port marked DV on your camera. Ignore the stuff about iMovie further down.
In FCP make your easy set-up DV NTSC. This will set things so that FCP is looking to the firewire port for a deck or camera.
You can buy six pin to four pin cables online. Just google it.
Best,
Tom Meegan
Woven Pixels, LLC