Need a good, simple tutorial to rig a model

I have the TU rig. I have a model I downloaded as a .blend

I can’t find clear instructions on how to take the model I found , lay the TU rig on it, and connect them so I can use the model. I’m not trying to make a new model; I don’t have the time or interest to learn how to make models from scratch. I just want to a model someone made available for use , connect it to the TU skeleton, and be able to use it for NPCs and/or my own character model Not sure if you have already seen this one and but if not, try following this video.