Lots of good questions, I'm glad you're ready to start planning for your little one!
If you live in the U.S. one program that I highly reccomend is WIC (women, infants, and children). I'm sure other places have something similar, I just wouldn't know what they call it there. But this program is a nutrition program, and you get vouchers for free specific nutritious foods while you are pregnant and/or breastfeeding, and if you choose to formula feed, once your baby is born you sign him/her up with the program and you will get vouchers for free formula, baby cereal, and baby juice. You will get grocerey benefits until 6 months post-partum, and once your baby is 13 months old he/she will get vouchers for solid food until age 5.
You can also get government help for day care. You will have to fill out forms but once they go through you can get drastically reduced prices for daycare. To get these forms go to your county's job and family services center.
You will also want to look into food stamps and medicaid or healty start for your little one (and yourself) which can also be done at job and family services.
As for school, I encourage you to try and continue with it. My baby is due in 2 months, and I will be continuing with my degree (I'm a sophomore in university) through the last part of my pregnancy and once he is born. A lot of colleges have family housing, which is where I am living. They are apartments that are for students with families, and usually utilities (including cable and internet, woohoo!) are included in your monthly rent. Sometimes they will even provide furniture. You should definitely be able to get government aid for your tuition if not for your housing once you state on your fafsa that you have a dependent. Most single parents in school I know have basically gotten their tuiton completely covered, which is a great help.
check out consignment and resale shops for used baby furniture or clothes, such as Once Upon a Child.
Good luck, and let me know if you need anything!!