How to log out of icloud on one iPhone only?

So my sister got an iPhone 4S and I have an iPhone 5, I wanted to know how I could log out of my icloud on the 4S without deleting everything on my iPhone 5 because I get her messages and she gets mine and it's so irritating:/

How to take off photos from my iphone from my computer?

I don't have itunes… Please help. Its taking up way to much space and no one has helped yet. Thanks.

Added (1). The only thing that pops up is
Import pictures and videos using windows
IMport pictures and videos using windows live
Open device to view files.

None of them get me anywhere. Please help. Ill pick best answer once it works!

Added (2). Oh and i have a hp 2009m.

How to activate my iphone 4? Merry Christmas?

In my family's apartment i don't have Wi-Fi working i went to apple support and no one was there so we called virgin mobile and they said that we need a computer to activate it but our computer doesn't work.

My Iphone 4 shows a full charge while plugged into charged but empty when unplugged?

I have an Iphone 4 that won't charge. However, when I plug it into the wall charger, computer or car charger it shows that it is 100% charged. Once I remove it from the charger (any of them) it shows the battery is empty. Has anyone had this problem and can you help with a solution? I have tried a full restore, hard reboot, etc. Nothing fixes this problem.

Why has my iphone 5 on contract come without a sim card?

I got an iphone 5 for Christmas. My dad ordered it online from the 02 store on a special online exclusive contract. The contract is £32 a month and that includes unlimited calls and texts and 1GB data. However when i opened the box with the phone in i found that it hadn't come with a sim card, and my old sim card won't fit into an iphone. I'm not to sure where to get a sim card for it from or how much it will cost? Any ideas?

How to get remaining itunes oney off itunes account?

I have $9 on my dad's itune account when he had an iphone, but he has since got rid of it. I just got an ipod touch and created a new iTunes account. When I try to put in the itune gift card activation code on my new ipod, it says its invalid. Is this because its still on my dads account?
If so,

I know my dads ID login. How can I get it off of his account, the remaining $9, and get it onto my new account to use?