How do you script buttons to buy roles or gamepasses in a game?

Hello, My friend and I are working on a Roblox game, its suppose to be an airport game where people can pay to be pilots, airport staff and they can also buy tickets, but we have no idea how to script any of the buttons. We tried actually scripting them ourselves but we failed miserably. If anyone can help us by telling us at least how to script it a bit, that would be amazing! Thank you so much

                                                                                                                      ** -AjayAviator**

The wiki has some great articles and examples for what your trying to do. I think the wiki could do a much better job of explaining it then I could haha.

https://developer.roblox.com/en-us/articles/Developer-Products-In-Game-Purchases & https://developer.roblox.com/en-us/articles/Game-Passes-One-Time-Purchases

I think you should read these documents before going into advanced scripting:

https://developer.roblox.com/en-us/articles/Intro-to-GUIs

https://developer.roblox.com/en-us/articles/Creating-GUI-Buttons