Lighting depends what you want to keep. Soft corals will be fine with low light,most stonys will require higher light. What size tank are you looking at?
You can make a reef as simple or as complicated as you want. I am currently running a reef with no equipment other than a return pump and a light. No heater, sump, skimmer, doser, etc. This is possible because it is a very small system (7g) with frequent water changes. They make "All in one" tanks nowadays which are probably the simplest way to run a reef tank and are proven to work well. They have the "sump" built into the back of the tank.
I would recommend you join a reef focused forum. Google for them, there are a few large ones. MFK is great but you will get more responses for this on a reef forum.