The purpose of godparents is to help the parents raise the child as a Christian. It is a very responsible role, so godparents should be members of the church: in other words they should be baptized and, if possible, confirmed.
It is traditional to have three godparents. If the child is a boy there would be two male godparents and one female. The child is a girl there would be two female godparents and one male. You may have more than three godparents if you wish.