That's a tough question. I just bought this...
I wish that I would have just started with this. This set has everything except for some skin tones. You should also pick up some washes. I would suggest a large bottle of both Games Workshop "Nuln Oil" and "Agrax Earth Shade". I realize this is a lot of money, however it's a good value over paying $4 a bottle or so at a local store. I support my local store, but paint gets expensive buying it in one's and two's.