What type of figure and what scale are you interested in?
1/1 scale are far more complex than smaller scales like 1/6 or smaller.
There are several tutorials on Youtube for doing realistic full sized figures although many that I have seen are for silicone.
Most of the garage kit painters used acrylics.
David Fisher has 2
DVDs out on building and painting garage kits that are very useful.
He started out mixing all his colors from Liquitex primaries using Raw & Burnt Siena and Umbers mixed together as well as white and black.
later I think he started using Freak Flex paints.
A lot of folks use the stuff found at Michael's like Apple Barrel and Deco Art.
Other folks use oil paints or layer them over acrylics.
Here are a few tutorials
link
link
link
link
Page on
ethnic skin tones.
There are also several books that can be found through Amazon.
I might also suggest signing up over on the
Club House forum, there are lots of very talented painters over there that are helpful and will even at times post tutorials.