Well, as far as the return policy, technically, they aren't supposed to take them back without a receipt or if they aren't on your registry. The return policy changed in August of last year. But, I know alot of times, they will go ahead and do it anyways. It really just depends on the manager. You may have to argue a little to get them to do it. At my store, they usually only do it for the people who get mad.
As for the classes, all the stores are supposed to have them. Like Shannon said, they have ones for breastfeeding, ABCs of daily care, nurture by nature, soothing your baby, help your baby sleep, car seat safety, and a few others. They are all free. You can call a specific BRU and ask, or they also have info on the website...here are the ones coming up for April
Toys''R''Us, Inc. - Our Brands - BRU 2008 Feb Special Events
You are supposed to sign up for them at whichever store you plan on going to. You can do that in the store or you can call them as well.
If anyone has any other questions, feel free to ask! I like being able to help.
Michelle