I agree with TomTom on the fluid. Drain it all and then refill with
DOT5. I have not actually had to bleed but it took a while before it
completely self-bled.

One gallon of brand-name commercial anti-freeze will be plenty. Be sure to
drain it from everywhere (block drain above and behind oil filter) then
put in the gallon of anti-freeze through the radiator cap, top off with
water with the heater turned on. As you run the engine the level will probably
drop some as you purge the air out of the system.

Some guys push synthetic oil. They last forever with much cheaper regular oil,
so I see little benefit. I would use a good brand, by an oil company, not a
specialty company. I use Phillips TropArtic. Texaco, Chevron, Mobil and
others make good oil also.

If your floor is not too thin (VERY common problem) you might consider
spraying undercoating on the floor and covering it with tarpaper ("building
felt"). I have part of a roll of which I would send you enough to do your
floors for the shipping. Left over from my last roof and couldn't bear to
throw it away. Should also spray the undercoat on the underside if it is not
already undercoated. Resealing the windshield will help keep recurrence down.
--
George Downs, Bartlesville, Oklahoma, Central US