Does your camcorder have a 1394 (Firewire) output? If it does, you may be in luck. You can get a $30 PCI Firewire card that will plug into the system board of your PC and will probably come with a cable to hook it to your camcorder. If not, cables are not expensive.
If you're using Windows XP, either home or pro, you have -- or can download for free -- Windows MovieMaker 2, a rudimentary video editing program that has a surprising amount of capability. It will allow you to capture video, edit footage, etc.
If you don't have a Firewire interface but only composite video or S-video outs, capturing analog video becomes a little more expensive. You can check the prices of the ADS Pyro capture card...or there are cards made by Matrox, Canopus, Pinnacle, etc. One caveat: some may be usable only with the manufacturer's editing software.