why dont you just ask the doctor where you had your kid?
References :

6 8 oz bottles and 6 4 oz bottles
References :
mother of 5 year old and 10 month old

Yes, you will use all the nipples, for sure. You will need to feed your child about every 3-4 hours, so depending on how many bottles you want to make in advance, that is how many you will need.
References :

well first of all i used all the nipples until i found the one my baby likes best then stuck with it. and you will probably need at least 8 bottles….
References :

Get as many bottles as you want… the more bottles you have, the less rushed you'll be in the middle of the night to make a bottle. I used to make mine at night and have some ready for the whole next day. Made it easy on everyone.
References :

I would buy as many bottles as you have money / space for. I would buy at least a half-dozen more if you can. Often, bottle types are personal preference. I preferred the bag type like Playtex Nurser because you can squeeze all the excess air out.
References :

Avent is good, although sometimes they leak you really need to make sure the nipple is in the top tightly. Definitely you will need at least four 4 oz and 4 8 oz, depending on how often you want to wash out bottles.
References :

I like the desposable insert bottles and you will need about 5 of each. Just to be on the safe side.
References :

Why would you bottle feed your child when nature has provided you with the very BEST in nutrition and you don't have to mix it, prepare it, warm it or bottle it?
References :

have 12, 8 oz botlles, you take a new one every 2 hours, and no time to wash them, better have a bunch. good luck:)
References :

How many you need to have, depends on how often you will be washing them. But, most babies need 6-8 bottles a day. This can vary depending on the baby's individual personality. You will probably start with the 4 oz bottles and the move up to the 8 oz as the baby's intake increases. Individual babies have individual patterns and preferences, but I used Avent with my son, and they seem to be the most popular at the child development center. I agree though with the other person, that maybe you should just get a couple of avent at first and see what your baby likes before you invest in a lot of bottles. Don't worry too much. It will be a fun and wonderful time!
References :
25 years as an infant/toddler specialist

As many as you can get…u can never have enough. yes you will use spares and avent is good but i like plytex the best.
References :
ME: mother of 3

We had 12 8-ounce bottles on hand for each child and 4-4 ounce bottles on hand for each child. We also had spare nipples on hand, too. This allowed for a bit of an excess in case the dishes didn't get washed one day, and the smaller bottles could be used for juice or water.
References :
Me: Mother of 8-year old son and 5-year old daughter