How many outfits or clothes should I have for him?

Pregnant with a boy. He is due on christmas and we moved to alaska. We don't have a car yet but I plan on getting one soon hopefully.

How much clothes in sizes should we have? Like onsies and pants and blankets and socks in what sizes? I want to get it now before christmas so I can also focus on my 3yr old and make sure she has what she needs too plus I need to make dure he has what he needs. Any ideas would help. Thank u!