It is not necessary to use facial cream during facial exercises as the exercises alone will help with firming and lifting of the skin which will also promote glowing.
Many facials use other mediums besides cream. Herbal facial masks can be used to create a paste then you can use a moisturizing cream once you have applied the facial mask.
Foot cream tends to be more thicker, heavier, and creamier than a normal moisturiser... which might clog your pores, and cause break outs if you have oily skin. If you choose to, you can put it on...
Of course not! if you care and want your face to stay healthy, just to stay on the safe side its better to buy another face cream. You will never know what it can do to your skin.