Regarding the second question: "Can I get 3D model of Mario and send that to a 3D printer?" meaning successful print, the answer depends on the model and the printer. Basically you can send any model to print, but each technology has its limitations of quality, size, physics. For figurines, resin printers (SLA or DLP technologies) seem best choice.
Printed figurines would be non-movable and empty inside (to some extent), unless are specifically designed as mechanical toys. I think this is the key difference between mechanical movement ability and modern 3d object animations.
As you already noticed, the mesh files could be reused here or there. So static objects like furniture pieces could be suitable for both purposes.