This is Mack:
And here, left to right, are The King, Lightning McQueen, some random race car, Thomas the Tank Engine (he needs gas too!), another random race car, Chick Hicks, and Luigi. They are all at the gas station, filling up before the big race. They also all take their turns on the train set in the background.
Sally is apparently lost somewhere in this giant mess of a car collection. This big bin is almost completely full of cars, mostly thanks to his Uncle Mitch.