My gradient map only does one color even if I have multiple on it, what could be causing this? I want to do gradients like this http://i278.photobucket.com/albums/kk91/oM.../skatercopy.jpg
First and foremost, the example you gave isn't just a gradient map. There's probably multiple gradient maps and tons of blending and layering. It's a bit more complicated than just clicking a button and hoping it looks right.
Are there any tutorials for beginners on gradients most of the ones I found didn't really explain how