Ametz:
Welcome to the board! This is a loaded question that can have alot of answer's.
1. What size tank? The bigger the better. Get as big of a tank as you can afford.
2. As for LR depend's on what size tank you get. General rule 1- 1 1/2 pounds per gallon.
3. Filter's??? I wouldn't know what the best kind would be as I will only use LR. Someone else will have to help you out there.
4. Light's
That's a good one! This is a very debateable topic. Some say metal halide, vho,powercompact's, etc... It really depend's on what you can afford and what kind's of coral you plan to keep. I'll let MR. SALTY or someone else help you out there.
5. Get test kit's. Salifert is said to be one of the best out there. For a new tank you will need... Ammonia,ph,calcium,nitrite,nitrate,copper (incase you don't know if you have any in the water), and a hydrometer(for the salinity). Any one else want to add some more? The best thing to do is to find out what is in your water. Get a print out from your local water company so you know what is in your water. Also a you should get a good ro/di unit(to purify the water).
I can't help you with the fish or coral's because I have no idea what size tank you have or will have. And you should not get fish,coral's,or invert's until the tank has COMPLETELY cycled. And when your cycling your tank stay away from DAMSELS. They are the nastiest fish I think I have ever seen.
6. Read, read, read, read,read,read,read,!!! There is much reading to be done before you even put water in your tank. Their are alot of friendly,and helpful people on this site. don't be afraid to ask question's and research the archive's on this site. there is alot of helpful info in the archive's.
I hope I have been helpful. And read
Danielle
Ps, sorry for the long post