1. It is e-ticket, bring your reference to airline counter to check it.
2. Keep your receipt of meal and get rebursement afterward.
3. After landing, go to rental company (like Avis) and show your confirmation number, they will tell you where the car is.
4. Normally you can find rental company is airport, go to counter and tehy will answer your all questions. You can also to select a CAR as long as it covered.

Good luck.