How would you give uniform to player on join?

I created a script, but it has to be chatted. Any way to make it automatic on join? Also, how would you add hats?

If you have the ids then it should be easy

local ShirtID = 'http://www.roblox.com/asset/?id=369695645'
local PantsID = 'http://www.roblox.com/asset/?id=419630782' --Put your ID's where the # is

game.Players.PlayerAdded:connect(function(Player)
    wait(3)
    local Shirt = workspace[Player.Name]:FindFirstChild('Shirt')
    if Shirt == nil then
        local ShirtObj = Instance.new('Shirt')
        ShirtObj.Parent = workspace[Player.Name]
        ShirtObj.Name = 'Shirt'
    end
    local Pants = workspace[Player.Name]:FindFirstChild('Pants')
    if Pants == nil then
        local PantsObj = Instance.new('Pants')
        PantsObj.Parent = workspace[Player.Name]
        PantsObj.Name = 'Pants'
    end
	workspace[Player.Name].Shirt.ShirtTemplate = ShirtID
	workspace[Player.Name].Pants.PantsTemplate = PantsID
end)