Resurrecting a 1984 318 from storage

I picked up a 1984 318 from an estate a couple of days ago that the seller didn't know anything about the tractor except it didn't run. When looking at it, I found the sight gauge line was completely rotted off, the battery is shot, a couple of tires were flat, it was really dusty and it wouldn't steer. We hooked up a battery charger to it and it cranked which I took as a good sign and when I removed the plugs, they looked clean and it had enough compression to blow my finger off of the plug hole. Another good sign. The hours on the hobbs meter showed 765 hours and the tractor didn't look molested like so many projects turn out to have.
Yesterday, I put in a piece of vinyl tube on the transmission and pressure washed off some of the dust as an excuse to test and repair my pressure washer that quit working at my mother in laws house on Monday. Last night I ordered from a web sight a reprinted copy of the owner's manual. parts book and service manual to give me an idea on how to do things.
What is going to be the best way to resurrect this 318 that has been stored for many years in an unheated garage with an empty transmission.
My thoughts are:
1) Drain the old oil out and replace with fresh oil.
2) Clean the fuel tank and add fresh gas.
3) Charge or replace existing battery and see if the engine runs.
4) Once engine is running add hydraulic fluid to see if it will move.
5) If it runs, moves and steers, start to remove all of the crud built up on the tractor, replace filters, fluids, fuel lines and a couple of other parts I know need replacing.
As you can see from the seat, it's been sitting.
I have seen a couple of other posts about resurrecting a stored tractor, but didn't put in the correct search words to find them, so any suggestions would be helpful.
Thanks.
Chris