I think your bird may be what is known as a "Sizzle;" a cross between a frizzled Bantam Cochin and a Silkie. The black skin and extra toe say "Silkie," as does the crest, though the lack of feathering on the legs makes me wonder if it might have been a cross with a frizzled Polish instead of a Cochin (Silkies and Cochins are feather-footed breeds). That might explain why the crest is so big, too. But either way, the crest feathers are a good indicator of gender in breeds that have them. Roo crest feathers are long and pointed, hen crest feathers are shorter and have blunt, rounded ends. Even in Silkies, the roo's usually get a few longer feathers on the back of the crest that can be a tip-off,
It can be tricky with frizzled birds, though. These two birds (named Puzzle and Mystery) hatched from eggs that were supposed to be pure Polish, but a Polish/frizzled Cochin cross seems much more likely. They aren't fully grown in these pictures; their crest feathers got a bit bigger. Both turned out to be hens, BTW.