Yes Jennifer, Spyderpig is right. Go to the town hall and complain about the people who are saying something bad. It will cause them to go back to their defalt saying. Chances are, someone you wi-fi'd with taught one of their characters to say the offending phrase, and they carried it to your town when they moved in. Now to answer some of your other questions,
Regina made a wonderful furniture guide that lists what type of furniture everything is. You can find it
HERE It lists the set the item belongs to, the name of the item, where you can get it, the cost, when you can get it, the feng shui colors it goes towards and the genre of the item. The genre will help fufill villigers requests.
Snow will come early to mid December, but be careful! If you run in your town you will kill the grass, and snow won't form where the grass is dead. Be careful with those snowmen. For more on that, you can go
HERE If by the Lights Festival, you mean the Christmas lights on the trees, it will happen in December.
You can't request someone to move to your town from the city, but some people believe you can "encourage" them to move to your town by talking to them in the city and then going straight back to your town without talking to anyone else. I don't know if it works, I've never tried it.
I think that takes care of all of your questions.

But if you don't understand something, or have more questions, just let me know!