How do i get to the rent office? Do they support a shuffle bus?

Once your out off the terminal. Head towards the pillars. One or two off then are red sign and the one you want for car rentals is in purple signs and que for the company shuttle bus you booked. It'll stop and pick you up and take you straight to the place.

I dont know English

There is a shuttle bus to and from the airport

You do online reservation then schedule what time you want to pick up the car. Come to pick up the car they will ask you for credit card and your driver's license and that's it they will give you direction to pick a car.

In front of the Airport you follow the sign Alamo. The shuttle bus drive you to the rent office.