Check out my grow journal - it's titled 'my very first grow' in the journal section and i give a breakdown of what i'm using... it's a relative cheap set up with one light and i'm growing in a cold uk climate...
I have a small hand built cupboard big enough for 2 plants with one light, an extractor reversed so it sucks fresh air into the box and a vent at the top to let bad air out... essentials are a thermometer... the temperature stays a constant 70° in there, a ph tester, and a moisture tester so you know when to water... after my first two plants died i was gutted, but persistance is paying off... i'm only 11 days into my new grow and the little fella looks amazing... check my journal, hopefully itmay help