New Tank help!!

[saltier]

Hello all, I am starting a new tank set up. I just purchased a 90 gal Oceanic, tank, stand and canopy for $475. It only came with the overflow and its attachments. Here is what I want to do..

I want to set up a total Hawaiian reef...fish, coral, inverts...my own little slice of Hawaii.

I know I will need a sump but have no idea where to get one and the help in setting it up without getting knocked naked over the price. I am guessing I will need a skimmer also??? I know I will need power heads and a heater and a good T5 bulb to assist with the growth of my coral and Coraline algae. Am I missing anything? Please chime in with good knowledge and instructions so I can make this a beautiful entertainment project for my family. Thanks to all that offer help and assistance.

P.S.
I heard there is a spot on here where people sale things like the stuff I need....Where is that located? And does it have credible items?