How do I lock the Character and camera so that it will stop moving?

players = game.Players
player = game.Players.LocalPlayer
character = player.Character
hum = character.Humanoid
cam = game.Workspace.CurrentCamera
function PlayerSetup()
	while true do
		hum.WalkSpeed = 0
		wait(.01)
	end
end
players.PlayerAdded:connect(PlayerSetup)

You could always just anchor the Torso, then make the Camera's CameraType 'Scriptable'.

Here's a quick edit of your code with that added in:

players = game.Players
player = game.Players.LocalPlayer
character = player.Character
hum = character.Humanoid
cam = game.Workspace.CurrentCamera

function PlayerSetup()
	while true do
		Character.Torso.Anchored = true
		cam.CameraType = "Scriptable"
		wait()
	end
end

players.PlayerAdded:connect(PlayerSetup)

And there you go, that's it.

If you have any further problems/questions, please leave a comment below, and I'll see what I can do. Hope I helped :P