Will synching my iphone 4 with iTunes delete all my apps?

My friend have me his old iphone 4 and it is currently not connected to any service I'm just using it as an iPod touch sort of. It has my friends old music and apps on it. I want to put my music I it but iTunes asks if I want to start it as a new iphone. I don't know because I definitely don't want to delete all my pics and apps

What it means when it ask if you want to start it as a new iPhone is if you would like to either use a backed-up version of it or if you want to start fresh. You will keep everything on your iPhone if you press "start as new iPhone". It would be best to sync you iPhone to iTunes. Y syniching it, you can back up your photos, music and everything else. Your data seems rally important to you so I highly recommend a back-up.

  • Why did iTunes delete all my apps? I plugged my iPhone into the computer to download a song that I had bought. All I did was upload the song to my phone, press eject, and take it out. When I went back to my home screen, all my apps were gone except 5 of them! Why did this happen!
  • Synching iPhone to New Computer? I just got a new MacBook. When I tried to synch my music from my iPhone, it said that since the iPhone can only be linked to one iTunes account at a time, that it will erase all music from my phone and replace it with the music on my computer (which is none because it is new). How can I get the music from my phone to my computer without having to erase everything from my phone currently?
  • Synching iphone, switching From Mac to PC? My other half surrently uses my Mac to sync her iphone but would like to use her own PC (trouble ahead?), but obviously Apple haven't considered people changing their computers… I know you can use some 3rd party software to back your iphone up and so not lose your content when you swap between one mac and another or one Windows machine and another but can you take the data using a Mac and reapply it using a Windows machine? If so how and which software?
  • My Iphone won't synching! - 1 I don't even have a lot of data on it, maybe some photos and no music, no video. Its been two days I'm trying to but it just shows Step two of five synching and no percentage bar… I left it pluged in almost for a day and nothing… I wanted to transfer a video, but I can't since its being synching. Btw I have the last version of itunes… Help me