T.O.
bjs has a fold up wagon for 90, but i would look at the toyrus website. I saw a radio flyer that had an infant little padded seat.
About the baby, we told our 1st born every early. It always takes her a bit to warm up to things. When we needed her out of the toddler bed so we could turn it into a crib we did it about 6 or 7 mths into the pregnancy. She got to pick out the sheets and we had the bed made for a month. She was 3yrs when i got pregnant with my other daughter.
We took the oldest on a mini vacation a few months after her sister was born for a just her time with mommy and daddy. That helped.