How old? Wyandottes are often tricky to sex. It's super common for pullets to pink up early. Right now the lacing looks pretty even. In the first picture the wattles are pretty small still, but they look larger in the second pic.
Depends on the age.
Comb and wattles are pretty red, and legs look rather large, so if this is a young bird, I'm leaning cockerel, and older bird would change my opinion most likely.