Kristy big hugs my love . It is a scary thought isn't it? But knowledge is power and you are doing the right thing asking questions.
I think Shel answered most of your questions.

Ususally if labour looks pending a dose of steroids will be given to you to help the babies lungs handle breathing (if before 35weeks) My baby was born at 28 weeks and weighed 815grams, at this size they require help breathing - your babies may need help to but that will depend on their gestation and size. Most babies are trialled on cpap first - this is "continuous positive airway pressure" and basically reduces the work your baby has to do for itself (to breathe).

Like Shel said parents are routinely told that babies go home at about their due date. Of course some are a little longer and some are a little shorter. But that gives you an indicator.

As Shel said your baby won't have a suck swallow reflex until about 35-37 weeks. Until then a tube will be put through your babies nose (if it is not ventilated) or through it's mouth into it's stomach.

Breast milk is liquid gold to all babies but especially premature babies. One of the things that happens for Mamas of premmies is that we often in those first early days feel helpless. A feeling that this baby doesn't belong to us but to the hospital. It can be really tough. As much skin to skin contact and kangaroo cuddles as is possible is important. Expressing is the gift you give in those first weeks. The NICU will have a lactation consultant who will speak to you and you will make friends with the breast pump!

Wishing you luck and please keep us updated.