Help with gmod models and props

i have had gmod for a while now and im use to puting everthing whare it is but for some reason now none of the models or props or anything for that matter dosent show up in my gmod menu so please help

Did you add them properly?

What models/props are you trying to add?

If you are taking addons and individually putting the materials folder into the GMOD materials folder the models to the models folder, then you are doing it wrong. Just copy the addon to: {<pathtosteam>/steam/steamapps/<username>/garrysmod/garrysmod/addons}

This is a common beginner mistake.