there is a book, I forget the name of it that everyone should read
also, equipment
bakpak skimmer
20-30 pounds of live rock
30-40 pounds of sand
0 pounds of crushed coral
lighting depends on whether or not you want just fish or if you want reef
powerheads for movement
don't get a canister filter
basically, keep your heater from your old tank
I guess if you have a power filter, you could use that for water movement if you take the media out and just want a fish tank...
it all depends on what you plan to keep in the tank, that is the first step