Congratulations, K.! You are going to love it up here! Here are some things I can tell you:
BSF: there is a Wed AM group at Peace Church (Eagan). Peace Church is on Nicols. I think if you go onto their website, you can search where there are meetings. But I think this one is the only one that has childcare available? I may be wrong.....
Church: I attend River Valley Church in Apple Valley, not too far from Eagan. It is Assemblies of God, and very focused on the kids! Check out their website for more information! www.rivervalleychurch.org We also have a Tues am moms group and a Wed night group as well. Both will start up again mid-Jan.
Piano: I know a couple that teach, I'll check with them and let you know if they might be accepting students late winter.
For winter accessories, don't buy the things down there just to haul up here. The end of January is when the stores start clearancing their winter gear, and you can get some pretty good buys. But I would suggest getting 2 sets for each kid - if they like to play out in the snow, you don't want to be drying that stuff every night for them to use the next day. If possible, also plan on buying for next year - at least one set per child. You can save so much $$$!
For a vehicle - most of them up here *new* have the option of all wheel drive/ four wheel drive, if that's not available, then opt for front wheel drive.
I'll try and think of more for you!