Then you'd shell out good money for no reason, the purpose of this board is to learn how to operate on your vehicle in a successful manner. Because you are scared to get under it does not mean you need to make someone else feel the same way.
Changing the ATF is a VERY simple PM issue often overlooked that can result in costly repairs. It'd be quite foolhardy to simply "replace it" when it needs only a new filter, pan gasket, and ATF.
If you drain the converter (that should still be a four speed 722 with no OD) as well as the filter, I'd pick up two gallons of ATF. Fill it with five then check the level accordingly. For some reason I think the converter holds about four quarts.
I use cheapo ATF from McParts in all my vehicles and has worked fine for hundreds of thousands of miles with no ill effects. Some swear by Syn in the ATF, not me. I do not go for extended drain intervals there and I do not beat on the unit to warrant the higher heat capacity.
No need for additives, just keep it clean and change it often.
Only tools that would be smart to add to the arsenal at home would be an in-lbs torque wrench so you can torque those pan bolts properly. Aside from that you need a screwdriver, metric sockets, and such.
Good luck with the drain, it's very simple to do.
