1) A person rolls. If it's even, he goes first. If it's odd, the other guy does.
2) Whoever picks the higher number goes first.
3) A person flicks the spinner. If it's, say, pointing more north than south, then he goes first. If it's pointing more south than north, then the other guy goes first. If it's exactly neither (then it's either pointing straight east or west), east goes to the spinner, west goes to the other guy.
Is that what you're looking for?