B2: Yes and no. You will have to pay transfer(miners)-fee, so it will be less than 1 BTC.
Let me add to this: NO NO NO! You can mess up your change address if you don't know what you're doing, so just
swipe the entire balance (and pay a transaction fee for this) instead of importing the private key.
I like using Mycelium Android wallet, it's very easy to import from the QR-code.
, though I guess you can use whichever one you want.