Welcome to the site, you came to the right place. This is a tall request, and I can only offer what I myself use, like the canister filter and live sand.
Have you read any saltwater aquarium books? That really is the best place to start if you have absolutely no idea of what to do.
There are endless books to choose from, I like the saltwater aquariums for dummies book, and it gets you past the basics in really fast and easy to understand language.
If you are not hardly that much of a beginner and have an understanding of freshwater but not saltwater and all you want is equipment…
You need a salt mix, buy a bucket to start.
RO water don’t use tap. Most of us get our own unit but Wal-Mart sells water for 37 cents a gallon. If you must buy your water you will need some 5g jugs. I have 7 I kept refilling until I had what I needed to fill my tank.
Then you need substrate, the choice is yours as to what you want, they even have black sand. I like medium sized live sand best.
You also need live rock, plenty of it like 40 pounds at least, because it is a natural filter. You can buy some live rock and some dead and let it seed, that is the cheapest route. Be careful of what type of rock for dead base rock, it can’t have any trace metals in it like slate, make sure it is rock for saltwater aquariums.
For fish only you need a hood with lights, very basic nothing fancy, like what you would use with a freshwater tank.
You also need two power heads, I like the Koralia brand, and they have a magnet and stay put. Get two smaller instead of one big one. Two number 2s..Fish store will know what that is.
I use a canister filter, there are lots of choices but I think canisters are the simplest and for fish only just fine. Fluval is a really good brand and easy to maintain.
An eraser looking thing called a mag float will make keeping the front glass clear a life saver. Believe me you need it.
Also get a good saltwater master test kit, I like the API brand or Instant Ocean, stay away from Red Sea, the tests are good but hard to read.
Whatever you do, don’t set up the tank and go get fish. Set up your tank follow the instructions for mixing the saltwater. Add your rock. You have to make sure the rocks are stable, twist gently and turn until you feel it “lock” into place with the rocks beside and under it. When it won’t move easy and you can hardly wiggle it then it is safe to continue…take your time, I like a cave. You don’t want your rock stacked too tight, the fish need to swim around and through. Also make sure you build the rockwork in the center of the tank, towards the back. You have to be able to fit the mag float to clean the glass past the rocks.
After the rocks, add your sand…it will be cloudy but will eventually settle, don’t run the power heads or filter just yet.
Once the sand storm settles, like the next day…turn on the power heads and set up the canister filter, it comes with everything you need.
Then it is a waiting time, do water tests because your tank has to cycle. When you reach that point, we can tell you about raw shrimp to kick start a cycle.. DO NOT USE A FISH..I don’t care what anyone tells you.
