baby stuff is overwhelming

So, I need advice.

1. Carseats... What infant carseat should we get? Or do we even need an infant one? Could we skip right to one of those convertible ones? It's probably convenient to carry baby in & out of the car in an infant one, right?
At first I was leaning towards the Britax Chaperone for an infant carseat, but then we bought our stroller and it doesn't work with Britax carseats. So now I'm thinking the Chicco Keyfit 30, because it has the next best safety ratings. But there are lots of other options too... I just don't knowwwww....

2. Baby carriers... I plan on "wearing" Baby Congdon around a lot. I've heard the Moby Wrap is good for when he's little, but it kind of intimidates me with it's miles of fabric. Is there a better one? Also, I really like the Ergobaby carrier, maybe for when he gets a bit older, and it's something Thomas could use to carry him too. Good choice?

3. Bottles/pacifiers... I plan on breastfeeding, but it's always good to have a few bottles around for other people to be able to feed baby pumped milk. Which ones are best for breastfed babies? Same thing with pacifiers...

4. Breast pump... I was thinking about just getting a manual one because it's not like I'll be working away from home. Are electric ones really necessary? Which brands are best?

5. Bouncy seats... necessary? What kinds/brands should I look for?

6. Swaddle wraps/ sleep sacks... What kinds should I look for?

7. What things have been invaluable to you? What am I missing? What do babies need?!

8. We'll be living in a fairly small apartment, so space-saving ideas would be very helpful too :)

Help me, please! :)