Here's a few things to help get you started in the world of cloth:
Pocket, All in one (AIO), Hybrid/All in 2 (AI2), Covers and inserts, fitteds and wool
How many do I need?
With pocket or AIO diapers you will need a minimum of 24 diapers for full time diapering. I recommend 30 as a more comfortable number
With AI2 or covers you will need about 8 covers and 24 inserts (or prefolds or fitteds) minimum.
Other useful items for cloth diapering:
-Wetbags! You will need at least one large hanging wetbag or a pail liner. I also recommend a medium or large bag in the bathroom you spray out dirty diapers. You will also need some smaller wetbags for out and about, cloth wipes, dirty clothes, and a million other uses!
-A diaper sprayer
-A drying rack for hanging diaper shells and wetbags