I'll give back the car at this place? Is there a Shuttle to bring me to the Departure Terminal?

Yes, there is one that passed very often.

Yes. About every 10 mins there is a shuttle to bring you to the terminal

Definitely the shuttle runs like every 5 minutes trough out the day..

Yes there is shuttle to airport from car return place. Shuttle is very frequent..

Yes there is a shuttle bus to bring you to the departure terminal