From my experience now...
1. Baby shampoo & soap
2. Diaper rash cream if your breast feeding, babies will poop so much. My son would poop from stretching. And I couldn't always change him every second so he caught diaper rashes.. I say triple paste is the best.
3. Bottles if your going to formula feed. I like dr.browns I rarely burp my son because of the bottles, they work wonders.
4. Clothes!!! Lol babies can't have too much clothes, they poop and puke so much they will go through clothes like crazy. Buy mostly 0-3 & 3-6 months
5. Get baby nail clippers, babies nails grow back so quickly.
Bottles,blankets, safety kit, bath care essentials including a rash care cream,paste,or butter, bibs, car seat, swing or rocker, somewhere for baby to sleep,example:(crib,bassinet, co-sleeper, pack n play, or your bed). those are must haves in my opinion, other things are wants.