I got my colors for my washes and figures but I am confused with some of the uses with some of the paint.

I got Flesh Hue and is this used for the base color; I think can some one help me?

Because it says nothing in the articles about Flesh Hue it just explaines how to mix the skin tone. Washes; shading; etc.

I also don't understand what these colors are used for ,

Black
White
Red
Orange

I also got the Mineral spirts, it's low oder, non-staining, crystal clear, quick drying. Is this a good oil thinner. I didn't know oil thinners can stain.

Happy Modeling

Make your own flesh tone by blending titanium white and burnt sienna. Adjusting the ratio of these two colors will give you a good range from shadow through base color to highlight.