Michelle,
Here is a website that answers your first question. http://www.equilters.com/library/quilt_issues/quilt_sizes-bed_sizes.html Quilt batting usually comes in crib twin queen and full or that is what I have found at my local store. How about Joining this forum it is a great place to hang out and get your questions answered. The members here do great work and we have all levels of quilters here.
Debbie