The Toy Store is a feature in Disney Infinity where toys can be purchased.
Disney Infinity 1.0
In the first game, each of the six Play Set Games has its own Toy Store, each of which is unique and currency collected in one Play Set does not carry over to another. Some items in the Toy Store are required to progress in the Play Set or complete Missions, while others have very little impact on the Play Set. There is a separate Disney Infinity Vault for the Toy Box, where toys are purchased using Spins acquired through game play.
Disney Infinity 2.0 and Disney Infinity 3.0
"Welcome to the Toy Store! Here you can purchase toys, buildings, weapons, customizations, and everything else to be found in Disney Infinity. Each item you buy will immediately become available in your Toy Box." —Narrator, Disney Infinity 3.0
In Disney Infinity 2.0 and Disney Infinity 3.0, the Disney Infinity Vault is replaced by a Toy Store. Nearly every item can be purchased from the Toy Store, with the exception of items from 2.0 Play Sets, items unlocked by 2.0 figures, and a few other select items. Additionally, the Toy Store is only available in the Toy Box and not in the Play Sets.