I was able to tease a little lore out of beta forums Thread: FFXIV: A Realm Reborn Player Feedback Status List that touches on your question number 2.
"The male Miqo'te markings are a special characteristic of the race, and aren't actually tattoos. They are born with these markings and they become deeper in color as they grow older, but similar to people who have thin and thick facial hair, there are individual differences. With that said, there are some female Miqo'te face types that do not have this, but all of the male face types do."
"The male Miqo'te markings are a special characteristic of the race, and aren't actually tattoos. They are born with these markings and they become deeper in color as they grow older, but similar to people who have thin and thick facial hair, there are individual differences. With that said, there are some female Miqo'te face types that do not have this, but all of the male face types do."
