Toy Story 3 (the game) has no "Toy Box Mode." You are likely confusing it with:
Toy Story 3 game released on: PS3, Xbox 360, Wii, Windows, DS, PSP, PS2. The "Toy Box" mode is on PS3, Xbox 360, Wii, Windows only. DS/PSP/PS2 versions are different (linear platformers).
Disney Infinity Toy Box was on: PS3, Xbox 360, Wii, Wii U, 3DS, PC, iOS, Vita.