There are many different paints on the market. When I use to build plastic model kit's I used Humbrol, Tamiya, Testors & Gunze Sangyo.
I liked using Humbrol & Tamiya paints.
Another one is Modelflex paint. Great for air brushing.
As for doing figures, I do not make customs & I have not repaired any figures so I have no idea what would be good.
I'm sure the other members will help out.