Updated: May 3, 2020
Birth to about 8 months for a lot of the things.
So this one is a very quick one just to share some of the things I found helpful when I had my little bubba. As a first time parent you can buy so much stuff that you never end up actually using or needing and eBay becomes your friend around about the 6-8 month mark when you're trying to make room in the house.
Angelcare Soft Touch Bath Support - https://amzn.to/2wIQUSz
Shnuggle Baby Bath - https://amzn.to/3dBsjzK
Baby Bag - https://amzn.to/2QPRS6i
Breast Pump - https://amzn.to/3arFW2z
Nursing Bra - https://amzn.to/2wA1viW
Haakaa Manual Breast Pump - https://amzn.to/2wA1Nq2
Breast Pads - https://amzn.to/2UpLGnK
Milk warmer, Sterilizer & Bottles - https://amzn.to/3bq4toK
Milk Bags - https://amzn.to/2UJEtOj
Nipple Cream - https://amzn.to/2JjEcN5
Baby Swing Chair - https://amzn.to/2UEkNvm
These are the main things that we made use of the most. We made home toys (rice in a bottle for a rattle) and really got creative with ways to entertain baby in the beginning stages (e.g. balloons tied to ankles and wrists) and didn't really need toys which saved us a lot of money initially. They came more when she was able to crawl and interact more.
Hope you find these useful and if anyone wants to share some of the things they found useful when baby was born please do go ahead and comment to help other first time parents that may be reading this.