I don't know if you need the 4 to 4 pin or the 4 to 6 pin cable for your PC or Mac.
In short, you should hook up with firewire. Cards and cables are over at newegg.com aplenty.
I have canon ZR85 handycam which has a miniDV casette. I dont have the suitable cable to download the video from the casette. With the cable which came with the handycam I am only able to download the pictures. could anyone please help me in buying a suitable cable to download the video.