How to clone a model to the positions of each player?

Something along these lines:

local model = pathToTheModel

for num, player in ipairs( game.Players:GetPlayers() ) do
	if player.Character and player.Character:FindFirstChild( "Torso" ) then
		local copy = model:clone()
		copy.Parent = game.Workspace
		copy:MoveTo( player.Character.Torso.Position )
	end
end

If you want the model to be in front of player, replace the player.Character.Torso.Position with this: (player.Character.Torso.CFrame * CFrame.new( 0, 0, 5 )).p.

Also, you will have to set primary part for the model.