Just so I know we are talking apples to apples, here, is your tractor a reversed forklift? Big wheels on the front? OK, as to colors of fluids, grey to chocolate most likely is water in the oil. Pink might be that someone dumped ATF into the compartment, believing that is what should be used. On a used tractor, I would never be surprised what someone has dumped into it. 1, 2, 3, sounds right. #4, look at your picture, under the gas tank. See the round breather cap, by the 2 wires? It has a dip stick about 6" long, attached to the bottom, unless someone broke it off. # 6 is a cylindrical object 2-3" tall, about 1-1/4" in diameter, behind the radiator, toward the right side, down into the front casting. Hope this helps some.