Interior Plastics Covering

I am looking at covering the Dashboard, in fact all of the interior plastics.

Anyone else done this and can give me an idea of just how much area of material I would need?

Also what have people used? What thickness?

Was the thickness of the material a pain when putting everything back together or did you compensate in the overlapping areas before adhering the material? I will be buying the material in the next couple of weeks so would really appreciate any help or advice.