We got lots of gentle wipes/sudocreme but we needed to try a few brands of nappies until we found what worked for ds as he leaked through a lot of them. I think he was just long and slim and some fitted his shape better than others.
Don't get a breast pump until you see what you need. I initially found a Mandela manual pump was really effective for me because I had an over supply and forceful let down, but other women may need a hospital grade electric plug in pump. Everyone is different in how much they pump etc so I'd wait and see what would fit you and baby best when baby arrives. If you need to pump initially the hospital can lend you a hospital grade pump.
I'd join a breastfeeding support group ahead of baby arriving so you've got good support in place. The early weeks are really up and down and often women can feel left to figure it out themselves a lot of the time. Baby will probably cluster feed (some days ds fed for 9+hrs on and off) and it was hard to feel that he wasn't getting enough so always remember your nappy output is more important than how much baby is feeding. Having support will really reassure you in terms of what's normal in those early weeks.
Line up your support from family and your partner. Talk about your expectations of each other especially if you do end up attached to the sofa feeding for hours at a time. Make sure he's prepared for that too because I know dh felt like a spare part at times with it. I'd find out where your local sling library is and get a stretchy wrap initially and then decide on a harness and go and get the fit checked in the sling library.
I loved our next to me for having ds beside me without physically co sleeping, but look into safe co sleeping set ups. If you're bringing baby into bed with you to bf when you're exhausted it's very likely you'll end up falling asleep at some point, so make sure you're in the safest position possible in case it happens even if you've no intention of actually co sleeping.
Glow in the dark dummies. We introduced one sparingly at 4 weeks and the glow in the dark ones are great for middle of the night wake ups. It helped ds with his reflux and wind and they're now shown to reduce risk of sids. Just give it 4-6 weeks if bf to allow your supply to get established before you introduce one.
A good feeding pillow and a snugglebundl were essential for me because I had a section. Plus I set up a changing station on our kitchen table and one upstairs so I didn't have to bend down or go upstairs to change ds initially. Similarly a pillow for between tummy and seat belt for the car journey home if you have one.
Ds lived in baby grows for the first 3 months. He had maybe 4 outfits that we rotated but baby grows are so handy to throw on with a wee cardi over. So I'd recommend lots of baby grows and vests.
A Frida nasal aspirator is so good for congestion and the calpol vapour plug in is great if they get a cold.
I found a glo egg room thermometer was really useful when deciding on what to put ds in for bed and as a night light.
I used 3 cot sheets but probably could have used an extra. Make sure you get a mattress protector as well.
Good luck!!