Uploading songs onto my iphone 3gs?

I have tried uploading songs from another laptop onto my iphone. It should just delete everything and then replace it all with what is on the laptop but it just stayed on step 2 out 5- the 'back up' step and does not exceed from that. I have updated it to a 10.5 if that changes or helps. Thanks and please help x

Added (1). Yeah it just kept having the stripes on the bar going quickly, no black line showing its doing anything.

Added (2). Yeah it just kept having the stripes on the bar going quickly, no black line showing its doing anything.

How to zoom in and out in iPhone 4S?

A couple of days ago I bought an iPhone 4S. But I have a problem. I can't find where's the coom of the camera. I want to capture photos but I don't see a zoom option. Also on the screen it appears a square but when I click it more than 2 times it opens the folder of the pictures. So can you help me to find the zoom?

Deleted songs on iTunes, iPhone 4, replacing music?

I had to swear off my computer which deleted all my songs on iTunes that I also had on my iPhone 4, if I add new songs to my iTunes and downloaded them to my iPhone will my previous songs on my iPhone be deleted?

Will Reset all Settings remove jailbreak?

If not, how do I remove jailbreak? Yesterday, iGot a new iPhone 4, because my other one fell down cement stairs, and iJailbroke it. Then my sister wanted me to do it on her 4s, so iDid. Then she didn't like it, and asked me to remove it. If reset all settings won't erase it, what will?

Added (1). She doesn't like jailbreak because:
1.It kills battery hella fast.
2.It voids warranty.
3. If it gets messed up, Apple won't replace i, and
4. She doesn't know what she's missing out on.

Two of the same people in one photo?

I'm not sure if it is an app but I think it's for the iPhone. But the effect is there's two of the same people in one photo and it looks real!

How to wipe an iPhone remotely without using iCloud?

I'm selling a water damaged iPhone, but i'm afraid that if the buyer repairs it they will have access to all my files that I had, i do not have iCloud so i can't do it through Find My Iphone, and i can't turn the phone on so i can't connect it to itunes or anything.