That's not the point! I know how to turn off hidden edges.
What i'm saying is when i select the UV Mapping Tool i can only select one axes.
The only part where i can select 2 axes is that part on the pic. Nothing else gets textured even when the whole thing is selected. I hope i made myself clear now.

I did select the whole surface but that's all it paints.

How would i go about texturing this? When i select the road part it only textures those 2 faces and when i select the sidewalk it doesn't work at all. Am i doing something wrong?