To create a layered shader, go to the hypershade, and at the left of the window there should be an arrow. Click and hold on that and select Materials. Scroll down the list until you see layered shader.

Theres a good tutorial on texturing and modeling here: https://www.interstation3d.com/maya/t...of_glimpse.htm

scroll down a little, and you'll see the texturing part.

Hope this helps dude!