The Smurfs' homes are typically depicted as simple mushroom houses with furniture and belongings suited for their small size. It's more likely that any toys the Smurfs have would be stored in their individual homes or in a communal area like the village square.
The idea of a dedicated toy chest might be something from a later adaptation of the Smurfs, like a particular episode of a show or a piece of merchandise. If you have a specific source in mind, it would be helpful to know what it is!