You got about 10 pages worth of questions there. Let's start with brand of paint, I use wildlife colors taxidermy paint made for airbrushing, never needs thinning. But there are alot of other paints on the market that are more or less expensive.
You need a compressor, moisture trap, regulator and some scrap cardboard to get started. Don't even pick up a lure until you have sprayed paint on cardboard for practice. You need to know how the equipment works and that will save you time and frustration.
As for cleaning I like windex and I take my brush down about 2 times per month for a good cleaning. the rest of the time I just shoot windex thru it.
good luck