Create new itunes account and transfer music on same computer

Question

I started an itunes account on my home computer which my niece would use. When she got a computer at her house, she also downloaded itunes. Instead of creating her own account, she used my account name and password. I purchase itunes cards instead of having my credit card number on my account. After loading the funds, I would return later to make a purchase and would not have any money left. I didn't think it was possible for her to have access to my funds at her home, since anything we added/purchased was not accessible at the others home. The last time I added money, I made a point to keep up with how much I used as a test to see if she was able to use my account balance. I tried to make a purchase this weekend and only had $.62, so apparently she can use it. She now needs to open a new itunes account on her home computer. Can she easily open a new account and transfer all music to the new account with playlists? Sorry this is so long...Your help is appreciated!

Answer 1

She can (assuming she has a credit card, iTunes Music card or gift certificate) certainly open an account.
But tracks purchased under your iTMS account will remain under your account and cannot be transferred to another account. The tracks can be copied to her computer - see:
iTunes: How to copy music between authorized computers
Though it refers to iTMS purchased music, it applies to all her tracks. And if she happens to also own an iPod:
How to use your iPod to move your music to a new computer
But her computer will have to be authorized to your account at least once for her system to be able to play the tracks she's already purchased. Once the system is authorized, you'll want to change your password to your iTMS account or she'll be able to continue to purchase using your account.