Inside workspace is a folder called “Dummies.” Keep all mannequins in this folder. Make sure all mannequins are named “dummy.”
Inside each dummy, you can find a shirt and pants instance. To properly add clothes to the mannequin, you must copy and paste the item ID into two different places: the “ShirtTemplate” or “PantsTemplate” property of the instance, and the value property of the “PantsID” or “ShirtID” values, which are a child of the shirt or pants instance.
Make sure to leave the GUIs inside of StarterGui. Without them, the system will not function as intended.
Now you have your mannequin set up! You can easily change the clothes on the mannequin, as well as add more mannequins. You don’t need to change any scripts, and you can customize the UI, but it is not necessary.
Can you elaborate on what you mean by only you get the buy prompt? Also the reason why only the local player sees the clothes they try on is because it changes the clothing on the client. You can use a remote event that fires when you click on the try on button, allowing you to run the script on the server. Hope this helps!