Just my own opinion but a good place to start is to work out your cal intake...you can start off by counting how many cals your currently consuming and then adding 3-500 each week until your happy your making progress.. (you will need to train too! lol) keep a track.. weigh yourself and measure to check your gains (or not) at the end of each week. Remember the importance or drinking plenty of water.. specially if you give creatine a try.
This forum is a great source of info.. read through the threads and you'll learn a great deal of useful advice on all aspects of training...with diets...training.. and the supplements that will help you.
Whey Protein is a certainty for immediate post workout (yes flavoured whey is fine just go with one that's recommended) ... look for one with plenty of added BCAA's (Like PHD Pharma or Boditronics) as they are the building blocks, you can try Creatine and see how you get on with it as I mentioned before. Any other miracle muscle BB'ing supplements will likely just be burning your cash away.
Its impossible to write everything down .. search the forum and if you cant find what you need.. post up your questions and there are plenty of knowledgeable peeps here to help you out....but it does take time to learn and experiment with what works best for you... everyone is different.
