To have manuals for equipment on any older, especially an orphan, is to look at each appliance, write down specs, and then do online searches piece by piece. The different manufacturers have what you need to operate them safely. This information was given the original buyer but can be easily replaced online if the previous owner lost it.
As for specific information on your 1992 T-2363 you can go to the "Files" tab at the top of our pages here and find that information as for weights and other specs. Even if you had purchased a new camper it would be best to load items as you would be camping and then go to scales and have your specific weights recorded. Everyone is different. Any weights are only a guess otherwise.
There are videos on YouTube to help you use the camper. Search for how to connect to campground utilities, or other problems you might have. Videos will help as much, if not more, as manuals.
Good luck with your T-2363. We are sure you can love yours as much as we love ours.