The price depends on where you go. Find the places close to you from dropzone.com and go to each dropzone's website. You'll have to go through the AFF course, usually after 1-2 tandems, and that is usually 5-6 jumps. Then you're on student status until you get to 25 jumps and pass certain requirements to get your A licence, which is the most basic skydive license. Cost really depends, so it's hard to say. It isn't cheap though, but damn it's worth it. And addicting.
Dropzone.com also a forums which can be a good source of info, just make sure you read a lot of the articles first so you get a general idea of things first. And remember it is a forum, so there are lots of differing opinions and it helps to take things with a grain of salt.