Do it yourself, cheat! :)
read about ERD
draw a fat book( hint type it in google images and specify as a clip art)
If you have car insurance, your own policy may cover accidents in rental cars -- check with your insurer. The rental agency will also make available an insurance policy that will specifically cover...
A rental car is exactly the same as any other car, there's really no difference. Not really sure what you are asking.
They could check the GPS if it has one.