How do you teleport(All) players?

Hey there what I would do in your case is use this efficient script found in the Roblox Wiki

wait(30)--Can be any other time
target = CFrame.new(0, 50, 0) --could be near a brick or in a new area
for i, player in ipairs(game.Players:GetChildren()) do
    player.Character.Torso.CFrame = target + Vector3.new(0, i * 5, 0)
    --add an offset of 5 for each character
end

If you want to learn more about teleportation check this link: http://wiki.roblox.com/index.php?title=Teleportation

You could make your own function :3

function teleAll(x, y, z)
    local pos = Vector3.new(x, y, z)
    for _, plr in pairs(Game:GetService("Players"):GetPlayers()) do
        if plr.Character then
            plr.Character:MoveTo(pos)
        end
    end
end

teleAll(0, 2, 0)

It looks like you've forgot an end. Here's the fixed code:

local player = game.Players:GetPlayers()
for i = 1, #player do
player[i].Character:MoveTo(Vector3.new(0,2,0))
end

Hope I've helped! If this doesn't work, just comment and I'll be glad to help.