Those cables, and the cards that let you connect them to your computer, generally don't come with the cameras. Lots of camcorders connect to a PC using a Serial port or a USB port. Both are much slower than IEEE 1394, however, so if you're going to be trying to transfer a lot of video to your PC, it's worth the investment to get that type of connection working. Some newer Sony models have wireless connections. They let you hook up without cables if you have the correct hardware.
Some newer cameras come with analog-in ports.
That means you can hook up an older camcorder and rerecord your analog videos on digital tape. This term is short for Charge Coupled Device. This is what captures the images for your video camera. The bigger it is and the more of them you have, the better your videos look. Keep in mind that your camera's listed weight tends to omit the tape and the battery.