if player have tool, cancollide equal false?

Let me try to explain this a bit in-depth since you said you're new to scripting.

Correct me if I'm wrong, but I'm assuming that you're talking about a script that checks if a player has a certain tool, and if so, sets a part's CanCollide property to false if the player touches it. This is a fairly simple thing to do; but first, you should know that tools are added to the player's character in the Workspace whenever they equip it. Using this, you could make a script that uses the part's Touched event to search if the tool is found inside the player's character (This script assumes that the script is inside the part):

local toolName = "Tool" --The tool's name
local part = script.Parent --Your part's directory

part.Touched:connect(function(hit)
	local tool = hit.Parent:FindFirstChild(toolName) --Check for the tool
	if tool then
		part.CanCollide = false
		--Add other things you might want the part to do
	end
end)

However, like I mentioned before, the tool is only added to the player's character when it is equipped, so this script would only work if the player touches the part while he/she has already equipped the tool.

Hope this helped and everything made sense