If you’re on a budget or just need a quick set to pass the time, here are recommendations that are under $10. Each set comes with at least a minifigure with most having 2 or more.
Superman Metropolis Showdown (76002)
This set contains both Superman and General Zod minifigures. In addition it comes with a yellow car and a collapsible antennae tower. The minifigures can grip the bottom of the yellow car to simulate throwing it around.
Kai’s Fire Mech (70500)
If you want to try the Ninjago theme, this is a good starter set. It comes with Kai in a really posable mech with many points of articulation.
Kraang Lab Escape (79100)
As an introduction to the Teenage Mutant Turtles theme, this set gives you Michelangelo, a Foot Soldier and Kraang in a mech walker.
Clone Troopers vs Droidekas (75000)
This is a great battle pack to build up your clone trooper army as well as getting tons of Droidekas. It includes 2 of each.
Republic Troopers vs Sith Troopers (75001)
This is another great battle pack if you need more Old Republic minifigures. It comes with 4 of them.