How do I convert a model to a tool in a 3rd person shooter?

Im trying to convert a tool to a model and make a custom player Model how do I script this?

Ok So I got this from a tutorial so I hope this helps

--//Camera Script//--
--Services
local UIS = game:GetService("UserInputService")
local RunService = game:GetService("RunService")
local TweenService = game:GetService("TweenService")

--Player
local Player = game.Players.LocalPlayer
repeat wait() until Player.Character
repeat wait() until Player.Character.Humanoid
repeat wait() until Player.Character.HumanoidRootPart
local Character = Player.Character
local HumanoidRootPart = Character.HumanoidRootPart
local Humanoid = Character.Humanoid
local CamScript = Player.PlayerScripts.CameraScript
CamScript.Disabled = true
Humanoid.AutoRotate = false

--Mouse
local Mouse = Player:GetMouse()

--Variables
local Popper = true		--	Sets whether Popper Cam behaviour is enabled
local DeltaX = 0
local DeltaY = 0
local AngleH = 0
local AngleV = 0
local SensitivityY = 120	--	Determines how large a change in vertical angle is through a mouse rotation
local SensitivityX = 120	--	Determines how large a change in the horizontal angle is through a mouse rotation
local W = false
local A = false
local S = false
local D = false
local Offset = CFrame.new(2, 3, 15)	--	Determines the CFrame by which the camera is pushed from the CFrame of the HumanoidRootPart
local MaxY = 5*math.pi/12				--	Determines maximum vertical angle
local MinY = -5*math.pi/12			--	Determines minimum vertical angle
local Combinations = {
	{true, false, false, false, 0, 0},
	{true, true, false, false, math.pi/4},
	{false, true, false, false, math.pi/2},
	{false, true, true, false, 3*math.pi/4},
	{false, false, true, false, math.pi},
	{false, false, true, true, 5*math.pi/4},
	{false, false, false, true, 3*math.pi/2},
	{true, false, false, true, 7*math.pi/4}
}

--Camera
local Cam = game.Workspace.CurrentCamera
Cam.CameraType = Enum.CameraType.Scriptable
UIS.MouseBehavior = Enum.MouseBehavior.LockCenter
local FakeCam = Cam:Clone()

--Functions
RunService.RenderStepped:Connect(function()
	AngleH = AngleH - DeltaX/SensitivityX
	DeltaX = 0
	AngleV = math.clamp(AngleV - DeltaY/SensitivityY, MinY, MaxY)
	DeltaY = 0
	local FinalCFrame = CFrame.new(HumanoidRootPart.Position) * CFrame.Angles(0, AngleH, 0) * CFrame.Angles(AngleV, 0, 0) * Offset
	Cam.CoordinateFrame = FinalCFrame
	if(Popper == true) then
		local Direction = (FinalCFrame.p - Character.Head.Position).Unit * ((Offset.p).Magnitude)
		local CheckRay = Ray.new(Character.Head.Position, Direction)
		local Part, Position = game.Workspace:FindPartOnRay(CheckRay, Character, false, true)
		if Part then
			local Distance = Cam:GetLargestCutoffDistance({Character})
			Cam.CoordinateFrame = Cam.CoordinateFrame * CFrame.new(0, 0, -Distance)
		end
	end
	if(W == true) or (A == true) or (S == true) or (D == true) then
		for Num, Val in pairs(Combinations) do
			if(Val[1] == W) and (Val[2] == A) and (Val[3] == S) and (Val[4] == D) then
				local DirectionVector = Cam.CoordinateFrame.lookVector
				local Position = HumanoidRootPart.Position
				local TargetCFrame = CFrame.new(HumanoidRootPart.Position, HumanoidRootPart.Position + Vector3.new(DirectionVector.X, 0, DirectionVector.Z))
				HumanoidRootPart.CFrame = HumanoidRootPart.CFrame:lerp(TargetCFrame * CFrame.Angles(0, Val[5], 0), 0.25)
			end
		end		
	end
end)

UIS.InputChanged:Connect(function(Input, Bool)
	if(Bool == false) then
		if(Input.UserInputType == Enum.UserInputType.MouseMovement) then
			if(DeltaX ~= Input.Delta.X) then
				DeltaX = Input.Delta.X
			end
			if(DeltaY ~= Input.Delta.Y) then
				DeltaY = Input.Delta.Y
			end
		end
	end
end)

UIS.InputBegan:Connect(function(Input, Bool)
	if(Bool == false) then
		if(Input.KeyCode == Enum.KeyCode.W) then
			W = true
		elseif(Input.KeyCode == Enum.KeyCode.A) then
			A = true
		elseif(Input.KeyCode == Enum.KeyCode.S) then
			S = true
		elseif(Input.KeyCode == Enum.KeyCode.D) then
			D = true
		end
	end
end)

UIS.InputEnded:Connect(function(Input, Bool)
	if(Bool == false) then
		if(Input.KeyCode == Enum.KeyCode.W) then
			W = false
		elseif(Input.KeyCode == Enum.KeyCode.A) then
			A = false
		elseif(Input.KeyCode == Enum.KeyCode.S) then
			S = false
		elseif(Input.KeyCode == Enum.KeyCode.D) then
			D = false
		end
	end
end)

What tutorial?