I'm clueless too, Munchkin - but there are some (always contradictory) lists around on the internet.
Basically, as long as you either have, or can purchase very fast, some clothes, some way of feeding, somewhere to put the baby to sleep, and some sort of shelter then you're already doing okay! Oh - and a way of getting baby home from the hospital, which may mean a car seat, depending on your circs.
I've bought some sleepsuits (and will get more closer to the time - but not loads, because I live near the shops, and can send the OH out to buy more appropriately sized ones once we have baby with us and know how big he is!). A crib - still need to buy a cellular blanket. Am hoping to breastfeed (if for some reason this is impossible, Sainsbury's is right by us and my OH will be dispatched, and before that the hospital isn't going to let the little Sprog starve!!) and we live in a flat! So that's the basics covered
Obviously we have accrued other bits and bobs...who doesn't! But there really isn't much essential, provided you have the ways and means to send someone to the shops for you in those early days. Or if it comes to it, get on Amazon and enjoy some next-day-delivery!