I have to agree with Beejaycee!
£20 or maybe less for a firewire card is nothing when you are spending £500+ on the camcorder. Sorry to give more bad news, but you will be spending far more than that on the PC in the not too distant future

. As the bug bites and you get into NLE you will be needing: new Hard disk drive, more memory, new software etc etc etc.........
To keep the price down for now I would recommend Moviemaker2. It is basic, but it will do all you need. If you are lucky it might be all you ever need. You can get some very nice results with it.
Don't be too put off by the above. It is a lot of fun and you get results right from the start. Upgrades only kick in once you start to out grow the hardware/software and can be bought bit by bit.
Cut up the credit cards and have fun
Mark.