To be honest, that doesn't look textured at all. It's just got different colors.
Yeah, it's just Blender generated materials. Which, if used correctly can end up looking nice and realistic, but I'm not adept at them and everything except the wood I've just been toying around with settings. I'll find a good metal tutorial and redo all of it later but for now meh.
Also,
BLOOOOOOOOOOOOOOOOOOOOOM
Something else that needs work.