I paint my models with regular auto paint. Just put on a light coat of primer and smooth out any rough areas and you can use auto spray paint to paint them. gives you a wider selection of colors.
Hobby lobby, sells models, and model paint and model building tools. Im sure they have hobby lobby in las vegas. If not just buy some off ebay. BTW where did you buy the model? Doesnt the store you bought the model at sell paint. Even walmart sells model paint.