I am going to be flying to St. Maarten at the beginning of October. I have never flown before and I will have a 1 yr old to accompany me. I am already stressed about flying alone (1yr old won't ease the stress) I have some questions! Any help will be AWESOME! I am sure all of this is posted on here elsewhere and yes I know there is a government site, but I want to know what REALLY goes on.
Airports I will be going through...Dallas, Miami, San Juan Puerto Rico.

1. What about hair products? Can I take them? Do I really have to buy those little 3oz containers? How anal are they about this?

2. What will I take for the baby to eat? How do I go about this?

3. Stroller...will they let me bring it and check it at the security or gate? Will it be waiting at the next airport gate for me?

4. How can you keep a 1 yr old from annoying everyone on the flight?

5. Underwire in my luggage? Is this a concern? I want underwire...but if it cause issues...I'll buy new ones!

6. What all can I carry on in my carry on?

7. How long does it really take to get a passport expedited?

ANY OTHER ADVICE WILL BE GREAT! SORRY ABOUT ALL OF THE QUESTIONS!! I am flying for the first time and this flight is the beginning of me moving to the Caribbean. I just need some advice! Thank you so much!