there are a lot of stickies here that you can refer to in terms of diet and workout routines, i suggest you start reading them first. That said your question about supplements, I think you have your thinking the other way around.

Dont think protein supplements are be all and end all for body building. Its just that; a supplement. Something to boost your protein intake. Its not something you need to have in order to grow. Instead, make changes to your diet to include natural, unprocessed food. Bodybuilding isnt just about looking good, imo. Its about a lifestyle change for the better.