volter9, you keep saying you want a render that doesn’t have things like specularity or shadows, but then you keep posting example images that do have those things. Can you find an example image that actually displays the features you’re describing? Or perhaps show an image that you made that isn’t what you want and show us what is wrong with it.
I think you just want a shadeless material. That’s easy: if you’re in Blender Internal, just tick the Shadeless box and you’re done. But as for “each face having just one color” I don’t know what you mean. Do you want each face to have a different color? Do you want the whole material to be just one color over the whole mesh?