So me and my friend are working on a game and we are running into a problem with our car shop GUI not saving. We are trying to make it so that when you purchase a car, it will save it and when you join, it loads all of your stats. I have also tried using a remote event, but I cannot figure out how to use it.

Here is some of our car spawn code and purchase code if it will help.

Spawn code.

game.ReplicatedStorage:WaitForChild("CheckPrice").OnServerInvoke = function(player,NameOfCar)
	
	return game.ServerStorage.Cars:FindFirstChild(NameOfCar).Price.Value	
	
end

game.ReplicatedStorage:WaitForChild("SpawnCar").OnServerEvent:Connect(function(player,NameOfCar)
	local car = game.ServerStorage.Cars:FindFirstChild(NameOfCar):Clone()
	car:SetPrimaryPartCFrame(player.Character.HumanoidRootPart.CFrame + Vector3.new(0,0,15))
	car.Parent = workspace
	car:MakeJoints()
	car.Name = player.Name.."'s "..NameOfCar
end)

Purchase code.

script.Parent.MouseButton1Click:Connect(function()
    
    if script.Parent.Parent.Purchased.Value == true then
        -- Spawn it
        game.ReplicatedStorage.SpawnCar:FireServer(script.Parent.Parent.Name)
    else

        -- Let them purchase it    
        local PriceOfItem = game.ReplicatedStorage:WaitForChild("CheckPrice"):InvokeServer(script.Parent.Parent.Name)
        
        if game.Players.LocalPlayer.leaderstats.Cash.Value >= PriceOfItem and script.Parent.Parent.Purchased.Value == false then
            -- The player has enough cash
            game.Players.LocalPlayer.leaderstats.Cash.Value = game.Players.LocalPlayer.leaderstats.Cash.Value - PriceOfItem
            script.Parent.Parent.Purchased.Value = true
            script.Parent.Text = "Spawn"
            script.Parent.MouseButton1Click:connect(function()
            -- Deletes the car if there are multiple.
                for i,v in pairs(game.Workspace:GetChildren()) do
                    if v.Name == game.Players.LocalPlayer.Name.."'s 1983 Yokoza Runner Rapid GT 2-Door (AA86)" then
                        v:Destroy()
                    end
                end
            end)

        end
    end
end) 

Here is the link to the game as well

Any help is greatly appreciated.