Take a look up at the top of this list of messages. You will find threads with a * in front of the title. Read all those and you will get the condensed version of everything you don't even know how to ask yet.
What you may want to consider is called an all-in-one rig. It's a get-your-feet wet sort of tank. Check out our sponsors in the blue area buttons. They're reputable dealers. You're talking under 500.00 to be totally set up with live things.
You need: dry sand; live rock; tank; light; skimmer; heater; pump. Ideally: downflow, sump, refugium. best yet: reef-ready tank with plumbing ready to connect. Not recommended: filter (fora reef), wet-dry, bioballs, crushed coral sand, canopy.
If you go, say, 50 g, with whole rig, ultra good gear, you can spend 3000.00. Wide range of options.