I can't add a texture to my models I'm trying to add a texture to my model. I'm following some tutorials om YT to know how to do it, But my blender doesn't do what it should do.

I can't add the correct things in the node editor:

This is what my node editor displays by default:
 

This is what it should display by default:


Also I can't add a image texture box in my node editor.

I hope someone can help me out on this. :)
That's probably because you are in Blender Internal,
try switching to Cycles.