Hey Ira having kept marines for a while now myself you`re lucky that you have the tank although I`d be careful with that fluval it may not be strong enough.You`ll need the following to get things started
Sand or crushed rock $5-$10 per kg
Rock (dead) $10-$25 per kg (live)$35-$45 kg
Salt $25-$35 per 4kgs you can either get synthetic or natural.
If you have a double lighthood already you will need a blue tube and an actinic.Something like a Blue moon and an Aurora 50/50 should suffice.
Test kits:p.H,Nitrite,Nitrate & Ammonia you really want the marine dedicated ones and not the marine/trop and will cost anything from$8-$15.Those are really just the basics but let us know how you get on