Shucks, gang - there's a simpler solution for the ounce bit. As any booze-hound like carnivore and me knows, a shot-glass holds an ounce. Forget the teaspoons and having to remember how many: just keep that shot glass handy. (Some are even have the fill line marked on them).
As ironchef pointed out, that is onlly a mesure of volume, not weight (it's a fluid ounce, the volume of an ounce of water). Since everything has different densities, thee can be no fixed measure of an ounce by weight, so, again as Ironchef pointed out, a scale is necesssary.