No, he is without beginning or end. Always existed since before time and will never cease to be. Very paradoxical.
No, men are not meant to be the head of the household. It can me a patriarchal family, matriarchal, or a 50/50 split. Mine for example would be matriarchal. Saying that a man is supposed to be the head of the family is very sexist. It was a sexist society back then, and that's why sexism is written into the bible, because man wrote it.