10 years... wow, not to be mean nor to rub it in, but that's one old computer. But really, it only means the computer was from 1999, so it's not that bad.
What operating system are you running? If it's 10 years old, it might not have enough ram or processor speed to run video editing software. Video editing software require a lot of RAM and need a decent amount of processing speed. What are the specs on your computer? What you can do is go buy a really good digital camera for ~100 bucks or something and make sure it has "video" capabilities. As for editing software... until I know the specs, I can't really recommend anything. You could get a better video card and more Ram, but some newer editing software just won't run on anything older than XP.