How do I find Character from this?

Touched event returns for the touched part. They does not return the character name, but the body part touched. So to locate the Character in a Touched event, do local character = hit.Parent.

Also you did a little mistake. Since sometimes some other parts like Baseplate will also touch the part, which also fires the event and returns an error "Workspace is not a Player" or something like that. You can detect if it have a humanoid, if not, return the function.

Lastly, your debounce script also have mistake. You can still bypass the debounce by making it true and false. What are you going to do is make a if-statement, if the debounce is true, then make it pass. Else don't!

I've set up the script for you. If you have any problems, comment below so I will get the notification

Script:

local debounce = true

script.Parent.Touched:Connect(function(hit)
	if debounce == true and hit.Parent:FindFirstChild("Humanoid") then
		debounce = false
		local character = hit.Parent
		local player = game:GetService("Players"):GetPlayerFromCharacter(character)
		if player and player.leaderstats.Tix.Value >= 9000 then
			print(player.Name .." Tix value is 9000 or more than 9000!")
			-- Do stuff here
		end
		wait(1)
		debounce = true
	end
end)