Everyone on this board would love to help you, but you need to delve into the hobby a little before we can help you. I would definitely purchase the book The Conscientious Marine Aquarist by Robert Fenner and read the beginning, where it explains how you would go about setting up an aquarium, what you need to get, and the different type of equipment. Once you understand it a little, post any questions you may have because then it will be a lot easier to help you. Reading the book is the easiest way to get into the hobby because it lays everything you need to know right in front of you and like I said, if you don't understand a certain thing, that's where we come in handy.
Good luck, and feel free to post any of your questions!