How do i script and dropper and a furnace which works in a normal tycoon games?

You actually have to show parts of your code, but because this is really easy I'll answer it as good as I can.

dropper code

dropper = script.Parent -- put this in the part that will drop the parts
TimeBetweenDrops = 2 -- time between drops

while wait(TimeBetweenDrops) do
	gold = Instance.new("Part")
	gold.Parent = workspace
	gold.Position = dropper.Position - Vector3.new(0,dropper.Size.Y,0) -- makes sure it spawns beneath the dropper
	gold.Anchored = false
	gold.CanCollide = true
	gold.Name = "Gold" -- name
end

Furnace code

furnace = script.Parent
money = 0 -- you can change this to a leaderstats value if you want, (or a global variable) it now prints your money everytime gold hits it)

furnace.Touched:connect(function(hit)
	if hit.Name == "Gold" then
		money = money + 1 -- if you need leaderstats, change this however you like
		print(money)
		hit:Destroy() -- destroys the part afterwards
	end
end)

Please mark this answer as best answer, I hope this solves the problems you had