Food is an artifact type. Even though it appears on some creatures, it's never a creature type.

You can't sacrifice a Food to pay multiple costs. For example, you can't sacrifice a Food token to activate its own ability and also to activate Maraleaf Rider's ability.

Whatever you do, don't eat the delicious cards.

A creature enchanted with Sugar Coat stops being a creature. Equipment attached to that creature become unattached. Auras attached to that creature will be put into their owner's graveyard (unless they could also enchant a Food artifact).

The enchanted permanent still retains its name, mana cost, and mana value. It isn't a token unless it already was one.