Yes, the Audi R8 is based on the Audi RSQ Concept Car.
MV Agusta F4
A lot!
about $80,000
One can purchase a kit for the car the Audi RSQ from a few places. Germany is one of the places that a person can get the Audi RSQ made from the kit. Because the car is what is known as a concept car and was only made for the movie IRobot, finding one at a dealership will be impossible.
I, Robot
You can buy it in Germany, but I would not bother going there, it's too far away.
There are a wide range of sites that offer Audi wheels online depending on what country one is located. In North America these can be purchased at Canadian Tire, Tire Rack, Kal Tire as well as most Audi dealerships.
205/55.16
Audi's recommendations are on the inside drivers door frame. It says 39 PSI.
Audi Type C was created in 1911.
pi(r2) = forumla for the area of a circle