how do you make a gui car shop ?

A shop that spawns cars but takes away money

This isn't a request site, however I'll give you some hints.

For the money you're best off making a leaderboard and putting the money instance inside it so it can be displayed and easily changed. A leaderboard example can be found here

Then you'd want to either make a GUI or a Dialog, as KingCamembert said.

Based on that you'd then want to clone a vehicle from probably ServerStorage.

Well, first, you'll need a money system. This can be done by connecting events (by script) to the money system, like KOs and WOs but slightly more complicated. Then, you can either do a dialog shop (easiest option) or perhaps a touch/click GUI shop. Someone posted this on the forums (http://forum.roblox.com/Forum/ShowPost.aspx?PostID=55338164) but you may find it easier to research on your own. I'm not an expert but I know the basic steps of it. You can PM me if you have questions.

This is not a request site. Please Attempt it first and put the script that you made in your question so we can see where you went wrong and so we could help you fix the script. WE DO NOT MAKE THE SCRIPT FOR YOU!