2 ? About Itunes account

[VR41541]

My daughter locked her IPad 2 out. She changed the password and didn't remember what it was. She's 4. Anyway we made her a new account so we could unlock it and in turn deleted all her music. Now my first question is can I hook up to my other daughters ITunes account and load up all her music to it with out deleting the apps I just put on it? If so how?


Second question. I have a ITunes account and got a ITunes gift card. How can I use it to buy stuff and not have what I buy go on to my bank card? Thanks for any info.