Replying to Photography Objects and What They Mean

I'm pretty much completely new to photography and im thinking about getting into it. I just have a few questions regarding this...

1) Why must one need to get a point/shoot camera and a digital camcorder, and not just be able to use one piece?

2) What is a camcorder compared to a dslr?

3) Does the type of computer you have greatly effect what type of editing software you can get?

Thanks for the help