When I was young, each set of irons came with 3 iron through the launch wedge, a set of 8 clubs. Then I would add a special sand wedge with additional bounce for sand throws, a set of wood for long throws and a putter to complete your set. Today, there is no standard set, but it is generally recommended that beginners avoid 3 and 4 hard irons. You can opt for 4 and 5 hybrids and then use plates for 6 through launch wedge.