I agree with jergle. The manuals are not specific. Any one will do as well as the original.
I am guessing you will figure most of it out yourself. Ask about various systems when you are ready. Make and model of individual appliances with a picture yield the best results.
Check the tire manufacture dates before any serious towing. Up to 5 years is good to go. After that risk of flats and blowouts increase. Jack it up and spin the wheels to check for bearing play or roughness.
Check the emergency electric brakes while it is off the ground.
Sterilize your water system before drinking or cooking with it.
Fill and flush your holding tanks to see if they are working or filled with solids.
If the TT will be subjected to freezing weather, learn how to winterize.
Check out your battery bank and power wires for cracks, loose connections, and corrosion.
You probably know most of this already and I have probably forgotten something vital. Reading iRV2 posts about care for old trailers is a good way to gain experience without a lot of risk. Keep us posted with your progress.
I wish you good luck and happy trails ahead.