Mf 135 tractor.? Engine?

you really need to know how to do this to not damage it, I would suggest you find a mechanic Friend to help you with it. if it's a Diesel then pull the injectors and spray wd 40 into the cylinders or pour auto transmission fluid into the holes where the injectors are. LEave them out and change the motor oil then with the plugs out and new oil and filter try cranking it over, if it moves your in Luck if it does not then you need help.