Render only has gray textures

Question

The "rendered" viewport in the editor shows my model just fine.

But once I actually render it it doesnt render the materials with it, instead everything has a gray texture. It doesnt render any lighting either.

I am using the cycles renderer.

Here are the nodes:

Those are for lighting. The render looks the same with them enabled. — Gammel2012, Apr 04 '18 at 17:32
Is the output section in the render panel set to "rgb" or "bw" ? — lemon, Apr 04 '18 at 17:34
Please use the [edit] link at the bottom of your question (https://i.stack.imgur.com/lXFuK.png) and add more information on how you set up your project. Please add an image that shows the nodes you used for the material. — , Apr 04 '18 at 17:39
Did you assign the material to the faces of your object? Read: Add different materials to different parts of a mesh? — , Apr 04 '18 at 17:51