Her name is Maude. She is listed as a kitten, but I'm not sure how old. The ad doesn't say this.
You know, the best advice I can give you about kittens is this. PLEASE be prepared for the extreme energy of a kitten before you get one. Kittens are babies and will act like children. They don't know the rules. They think everything is climbable/shreddable/chewable. They run. They play.
An unfortunate thing I see volunteering with rescue is the family who adopt a kitten after euthanizing their elderly cat, then return the kitten with comments that suggest the energy is too high. They are looking for a more relaxed and laid back cat.