Welcome to the forums!
Here are a couple of links that may help a bit.
Unfortunately I think you will find the manual sorely lacking in information. The best bet is to make a list of the various appliances and components, get the make, model and serial number then hunt down the specific manuals for them.
In the meantime if you have any questions, feel free to ask away. There are a good number of knowledgeable members on here that will be glad to try and help you out.
Good luck with your new to you RV and get us some pictures... we LOVE pictures!