1. To be honest, I haven't fully disgested them yet myself

you can find them
here.
2. Scoring rules are
here.
3. This is the one problem with it - you will have noticed that you have a very tight budget to begin with. As the game progresses, you get more money, and eventually you'll be able to afford the best drivers. So yes, you'll need to keep changing as we go along, but doing this once every two weeks is hardly a hardship

. Rules on transfers can be found
here.
4. I don't blame you, why deny your obvious genius