For some on topic reply -
1) For a typical pregnancy with an uncomplicated delivery, I was billed for prenatal care, the hospital itself and associated costs (L&D room, recovery room, medication like ibuprofen, food), an anesthesiologist for an epidural, the medication for the epidural, and newborn costs (room, vitamin K, etc). For just the hospital, the total bill was >$15,000, I think, plus $5000 for the prenatal care at a different facility. We only paid our out of pocket max, fortunately, because everything was in-network.
Prior to delivery, even though I was in a "plan" with my midwife clinic, all of the labs and ultrasounds were billed separately from the $5000 final bill. I don't know if this is typical, but since they're often through outside services, maybe it is. If you can keep your pregnancy inside a single calendar year it's helpful :)
2) I have zero idea about this. I had Aflac hospital indemnity plan, which was nice, because they ended up paying us about $1700 for the hospital stay and epidural. Totally separate from your actual insurance plan, though.
3), 4) Make sure everywhere you're considering is in-network.
5) I have no comments on the specific insurance plans, but I'd do a comparison on your total out of pocket costs, probably assuming you're going to reach your out of pocket max. Make sure to include your premiums, deductible, and co-insurance before you reach the max, as well as tax savings from maxing out a FSA vs a HSA.
Looking at the insurance plans I have available currently, we come out ahead by ~ $50 with a high deductible plan, but that's solely because my employer contributes to my HSA. Otherwise the traditional plan would be far and away the better choice.
d) A birth counts as a qualifying event, and generally you have 30 days from the birth to add your new child to your current health insurance plan. The plan itself won't change, just the number of people on it, and yes it should retroactively include everything from birth forward. Most health plans will cover all vaccines and well-baby and well-child visits for years. Anything else like pinkeye or crazy "my baby won't stop crying oh God what's wrong?!?" visits will be just like a regular visit that goes toward your deductible.
Like onlykelsey said, take some classes, especially birth and breastfeeding classes. You really have no idea how some of this stuff works, and it's pretty crazy. I took a pain management class, which was moderately helpful? You might want to check out the Fertility, Baby, and Pregnancy journal here on the forums - there is a nice list of books/resources for pregnancy/birth, trying to conceive, child rearing, etc, you could look at.