Check my edit: Monoprice is the way to go.
You will need:
Speaker Wire - for the 5 Speakers (2 Fronts, 2 Rears, 1 Center) assuming you are doing a 5.1. Unless you are doing a really long speaker wire run (>50ft to a component) then i would recommend 14 gauge wire.
Banana Plugs or some other type of cable end. That depends on the ends of your receiver and speaker. Binding Posts use bannna plugs. Spring Clips use crimp on flat plugs. Binding posts are used on most AVRs. I'd like to link them for you but the forum software says there is a censored word in the URL. :Q
Subwoofer Cable -You can use any RCA Cable or digital coaxial cables. If you don't you have one then follow the link on Monoprice.
Optical Cables - for your Components (DVD Player, Console, Newer Cable Box). If your DVD player or cable box use Digital Coaxial then get one of the cables in the subwoofer link.
RCA Cables for any components that don't have digital outs (VCR, Older Cable Box, Older Consoles). The Old Red, White, and Yellow cables.
As for speakers, the sky is the limit. Head out to some of the AV shops in your area (more than Best Buy or Circuit City) and listen to the systems available in your price range. Don't buy the first thing you hear. Instead compare them and see what you like best. Most of the smaller shops will allow you to bring in a favorite DVD or CD to compare. There should be plenty of smaller AV stores in your area (whatever area that may be) you just have to search around a bit. YoYo, chapbass, or anyone in this forum can recommend a good system that a lot of people like but it is very hard for a third party to recommend one that YOU like.
Just don't buy any out of white vans

and if you are unsure of a brand name, post about it here and we can tell you if it is a quality company or not.