http://www.videoguys.com/started.html is a
good place to start. There's lots of tutorial
information on the site. (And they're reliable
dealers, FWIW).
I've used both Canopus and Pinnacle vid cap
cards with good results.
How can you save money? Buy your NLE in a
bundle with your capture hardware. That's
assuming you'll want to do some editing,
which is more likely than not.