there are a buses(not a suttle)to the rental car area. if renting a car, meet there. in front of the budget or hertz counter. there is seating. no food sales.

if going to a hotel, some hotels have their own shuttle. you may have to call them to get the shuttle.

some of the hotels have a shared shuttle. i have not taken it, but it runs very infrequently(less than hourly).

there are other kinds of shuttles going to offsite parking. and to downtown dallas.

dfw is very big. not like iad or dca, or even bwi(which i am familiar with)