It really depends on the baby - my baby is breastfed and spit up a lot for the few first months - I used at least one burp cloth a feeding and she ate every two hours for months! Also used 2-3 outfits a day since she could manage to get the spit up on her even with a bib, (yes, also used 2-3 bibs a day,) and that doesn't even take into consideration all the blow outs she had in the beginning!
We used lap cloths all the time when changing diapers to contain all of the blow outs - protects whatever surface you're changing the baby on - my baby also had a habit of peeing EVERY time you tried to change her - you'd get the clean diaper under her and surprise - she's peeing - lap cloths kept us from having to clean up the surface under her - just toss the lap cloth in the wash - used lots of them!
Wipes are one of the most used items for any and every baby - I use Seventh Generation - chlorine free safest baby wipe.
We used 1-2 sleep sacks every night and only had 3 so were constantly washing those - preferred the swaddle ones to keep her calm.
Also will need a several pacifiers if using since they constantly drop them and need to be washed- my baby only liked the Nuk ones - whatever your baby likes make sure to get the silicone ones that are paraben, phalate and PVC free (same as your bottles and teethers.)
Until you know what your baby is like you need to have a minimum of everything - one package of cloth diapers to use as burp cloths, about 14 bibs, 14 outfits, 7 lap cloths, 4 pacifiers, several sleep sacks, several containers of wipes and diapers - (my baby went to the bathroom every time she ate - so that was 12 times a day -have LOTS of diapers) - that quantity should get you through the first week or two with minimum laundry and then you can purchase what you need based on your baby. No matter what you buy prior to birth there will be things you had no idea you would need so badly once the baby arrives and things you thought you just had to have that you never use!