How do i make remote events to change my stats?

You posted your code all bunched up so it's hard to read, but here is how you use a Remote Event to solve your problem, assuming the problem is just that you want to change a players stat when the said part is touched by that player: For this example, I have a Part named "Part" in the workspace, a Remote Event named "Touched" in ReplicatedStorage, two Scripts inside of ServerScriptService, one for setting up the leaderboard and another for handling the Remote Event, and a Local Script inside of StarterPlayerScripts. Local Script:

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local touchedEvent = ReplicatedStorage:WaitForChild("Touched")
local player = game:GetService("Players").LocalPlayer
local part = workspace.Part -- rename this variable to whatever you want and locate the part you want to have fire the event when it is touched
local debounce = true -- optional, but recommended
part.Touched:Connect(function()
    if debounce == true then
	    debounce = false
	    touchedEvent:FireServer() -- automatically sends the "LocalPlayer" as the first parameter
	    wait(1) -- for debounce
	    debounce = true
	end
end)

Remote Event Handler Script:

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local touchedEvent = ReplicatedStorage:WaitForChild("Touched")
local function onTouchedEventFired(player)
    local money = player.leaderstats.Money
    money.Value = money.Value + 1 -- adds however much money you want to the players money
end
touchedEvent.OnServerEvent:Connect(onTouchedEventFired)

Simple Leaderstats Script:

local function onPlayerJoin(player)
    local leaderstats = Instance.new("Folder", player)
    leaderstats.Name = "leaderstats"
    local money = Instance.new("IntValue", leaderstats)
    money.Name = "Money"
    money.Value = 0
end
game:GetService("Players").PlayerAdded:Connect(onPlayerJoin)

Please let me know if this isn't the answer you were looking for, I would be glad to try and fix it! Hope this helps!