The very first set to feature a LEGO minifigure was this set: 600 Police Car. Though the model is small and extremely disproportionate, the set is so significant, as it led the way for thousands of sets with thousands more minifigures. Released, of course, in 1978 following the patent of the LEGO Minifigure, it was composed of 23 pieces, and shared set numbers with an Ambulance set released in 1970.
When The LEGO Group patented the LEGO Minifigure in 1978, the friendly little LEGO people came in dozens of brand new products, in three themes: Town, Space, and Castle. The third of those three was led by this set: 375 Castle. The classic yellow brick-sterpiece marked the dawn of one of the largest themes ever produced by LEGO. Composed of 767 pieces, this set had 14 minifigures hailing from 4 different factions all arriving just in time for the joust that was sure to take place, with their brick-built horses, lances, and shields, and being clad in helments and bright, colorful breastplates.