Saltwater Aquarium Supplies

I intend to install a saltwater aquarium 75 0r 100 gallons, what supplies do I need and what price should I look?

just the basics
Filter
ocean mixing
hydrometer (to test the amount of salt in water)
heater
dechlorinate
bucket
thermometer
skimmer (most expensive piece of the tank)
Top for the tank
If you want a coral or a special light enimies as expensive
crushed coral or sand £ 40
living stones until the water in the tank as 75 pounds like 8 dollars a pound

You could prolly out under 1200

It depends if you want a fish tank, if you want to use living stones, or if you want a reef aquarium.