The one with the crank handle and rollers is what some refer to as a "wringer barrel",or at least that is what we call them around here.It would be about half full or a little more with water.The water was used to rinse out a chamois cloth that had been used to wash a windshield,then the wringer rollers dried it out enough for the next car.That may be what is hanging on the side of the barrel;ready for the next car,