R.C.
All children are different. My son is 2 now but for the past year he has slept about 9 hours a night with a 2-3 hour nap. I do have friends who children sleep longer at night but then take a shorter nap. I would say if your daughter doesn't appear tired and is not irritable from lack of sleep, she is fine.
My son took a liquid vitamin from a dropper until he was about 18 months old and had all of his teeth. I then began giving him a gummy vitamin.