OK, Take it from a pro...
You need A Britax Car seat Dont let anyone tell you that anything else is better... Do your research if you want but it is truly the best made car seat that meets and exceeds the US standards.
I used the Britax infant seat from birth to one year then I used the marathon and now I have the Regent its 5 point harness system goes up to 80 pounds!
Or you could skip the infant seat and go straight to the Britax roundabout or Marathon and use a babybjorn front carrier or cheep infant seat to carry them around in when they are not in the car.
Next you need a Combi or Britax Stroller. If you must get the combi stroller then you can get the Combi Car seat as well. or you can buy the britax infant seat and the combi universal car seat stroller that holds any car seat and works great (I LOVED THIS, it folded SO compactly and was easy to use!)
After the infant stage I really LOVE the McClaren umbrella style stroller. it is SOOO solid and is the ONLY stroller you will need as it holds the larger, older preschoolers as well.
If for some reason you have 2 kids then the Combi TWIN stroller is the way to go. it swivels completely with one hand and fits through any door at the mall. its also very light weight and folds down then folds in half and has a shoulder strap that makes it so easy to travel with. LOOK ONLINE AND EBAY is a great source. I have bought all my combi and britax stuff on Ebay new in box and for less and often free shipping.
If you are short on space in your kitchen then get the Graco Space saver high chair seat. it is just like a high chair but attaches easily to your kitchen table chair.
I would not waste your money on a boppy my kids NEVER used these and I am a size 18 and it did not fit around my waist so I could not use it for breast feeding I just used a pillow.
The BEST bottles are the Dr. Browns they are FAR better than the Avent and Really reduce gas. I just wash them in the dishwasher and the parts in one of those dishwasher baskets on the top shelf. I do actually like the Avent sippy cups though I prefer the white spouts.
TRY not to go crazy shopping for baby clothes. remember there are only 7 days in a week and they grow so fast that you will end up with tons of unworn or hardly worn clothing and a pile of credit card debt that you wont be out of until you have to take out more loans for college.
Do your shopping at Resale shops like Kid to Kid, Cutie Patootie and Once upon a Child...
I also like the better Goodwill and Salvation Army stores. I have actually found lots of items new with tags...
Ebay is also a great resource for clothing and Craigslist is also good for the larget items like furniture and toys...
SAVE all your baby food jars in a box in the garage and sell them on Ebay or Craigslist. it is a great recycle project and lots of people are always looking for those things. Also, When your child grows out of the clothes/ toys sell the good stuff on Ebay and the rest in a garage sale what does not sale, give to a charity for a tax write off.
Onsies are great to have. My kids lived in them...Sleepers with feet are hard for them to wear unless they REALY fit well. otherwise the babies feet end up out of the sleeper feet and all tangeled up.
get the swallder blankets that have the velcro I think its called Swaddle Me (target and babies r us have them) those work real well to swaddle them with.
If your baby if fussy, try making a HOT SOCK (take an adult tube sock and fill it with dry white rice then tie the end in a knot. Heat the sock up for about 30 seconds and place on your breast then put the baby, swaddled in his blanket, on top of the hot sock that is on your chest so that the babies stomach is on the hot sock and then pat the baby's back and sway with the baby. this helps colic. It also helps to heat up the place where the baby sleeps with a hot sock or hot wather bottle before you place the baby in bed. this helps the baby to fall asleep.
Mylecon drops for gas work great use them often. (I use the target brand they are less than half the price of the name brand)
If you choose to breast feed but want to pump some then use the Medela Pump in style, it is the best for part time pumping.
If you are going to pump all the time and not feed at the breast then rent (or buy on Ebay) a Medela Lactina hospital grade breast pump. I really like that one the best.
When you start to give baby the baby foods, start with baby cereal first (use baby oatmeal if your baby is constipated because the rice cereal will bind him more). once you baby has mastered cereal go to veggies. Once you start fruits they often wont want veggies as much so wait until he is doing well with veggies to start fruit. (but use prunes or prune juice for constipation if that is a problem)
After I went to the fruits, when one of my sons did not like veggies I would just mix it with fruit and cereal and he would gobble it down...
Well, Good luck, I am sorry I went on and on... holp it helps!
A.