Newbie with 80 gallon tank HELP!

Hi,

I recently came into possesion of an 80 gallon tank with a Rena
Filstar xp3 with spray bar and a EBO-JAGER 200 Watt heater. It didn't
have a cover or light, or manuals but hey it was all free, and it was
working (It had two freakin' huge gold fish in it).

I am new to 'aquaria' but would like to do a marine tank.
I don't know crap about doing this but I don't mind taking my time and
spending some cash. I am planning on buying 'The New Marine Aquarium:
Step-By-Step Setup & Stocking Guide' and 'The Conscientious Marine
Aquarist: A Commonsense Handbook for Successful Sal****er Hobbyists'.
This seemed like a wise first step. I'm not looking to create a
master piece, just something that looks 'natural' (ie. Rocks
(reef/coral??? and some colourful fish).

Question 1 : What else do I need equipment wise, other than what I
have, and is what I have okay for a marine setup? If so what is the
optimal setup for the canister, with regard to the components in it
(ie. foam pads, charcoal)?

Question 2 : What are some good online references (ie. web, newsgroup,
associations, online suppliers)?

Question 3 : What is a good (meaning hardy) setup for fish and coral?

Thank you very much!