a few things you will need to decide on before moving forward:
1. Type of keg you want to go with for holding finished product
Pin Lock---cheaper, harder to come by and replacement parts will most likey come from online sources
Ball Lock---easier to come by, most local homebrew shops will carry parts
you can typically find these on CL or can buy online
http://www.cornykeg.com/catalog.asp?prodid=674151&showprevnext=1
2. Storage for kegs
Kegerator
Keezer
or fridge
you can do some searches in the DIY section of this forum to get ideas or you can just buy a kit that serves from a fridge (basic kit). Heres a link
http://stores.kegconnection.com/Categories.bok?category=*Homebrew+Kegerator+Kits%3 APin+Lock+Kits
If you want to get up and running quick as possible i would suggest that you do some looking on craigslist for corny kegs, it really doesnt matter the type, and then buy a basic kit to match (you can always modify later if you want to build a kegerator or keezer). You may also be able to find a C02 bottle on CL (at least a 5#), which will cut the cost of the basic kit online. Then all thats left is to get to brewing.
Cheers