Do you have a local Home brew shop? If so, they will have everything you need. If not, then there are plenty of online shops that will sell equipment kits. You will need a fermenting tub, airlock (although you can brew without one), hydrometer and test jar, thermometer, large brewing spoon/paddle, syphon, sterilizer (VWP or starsan etc) and something to store your beer in (bottles or a pressure Barrel).
I like the Festival and the Youngs beer kits. You get all the ingredients you need to brew a decent beer. Currently got a Festival Razoeback IPA on the go.
Jas