You should check out the pictures area of this board (top left of the home page) and have a look at some of the systems on there so you get an idea of what things look like in astablished tanks.
The best advise I can give you is do your reasurch, and buy the right equipment that is to the right specs. for your tank. Don't cut corners, this will only give you more trouble than it is worth and you will have trouble keeping things alive or healthy. Also TAKE YOUR TIME... Don't rush things.
If done properly this is a very rewarding hobby. Good luck
