About iphone 5 backup and restore?

Hi! I made a backup of my iphone just now and i wanna restore it. But when i do it says that i don't have enough space on my device.

Do i have to delete everything on my device before i restore it?

You will have to delete as much thing which is required to restore the backup and in case you need to have some serious security app, the best app would be Leo Privacy It allows you to hide your personal images and videos and also you could lock applications through it.

  • Will my passcode be removed if I backup and restore my iPhone? So my dad put a passcode on my iPhone4… I have the phone but it has a passcode… Can I crack the passcode with ios7? Is there anyway? Or I have a computer synced with the phone… Can I make a backup and restore? If I do so passcode will be removed? And if yes… Then how can I get the same passcode back? so that my doesn't know that I used my iPhone! Or can I unlock the passcode somehow using iTunes?
  • When you restore an iphone from itunes backup does it restore messages? I need to restore my iPhone 4S in iTunes, will I lose my messages or will it leave the messages from my most recent back up?
  • When i backup my iphone 5 and restore iphone 5s will everything be the same? So when I restore on my new iphone will everything be the same like even the app layout will be the same from my old phone.
  • What does set up as new iphone and restore from backup mean? I have an ipod touch and I have many pictures, apps, and music on it. And now I have an iphone. I plugged my iphone in, and "Set up as new iphone or restore from the back up of" popped up. What happens if I set up as new iphone? What happens if I restore from back up? What do you suggest? I don't want to delete anything from my Ipod or my Iphone. I don't want apps, music, texts, or photos to be deleted. What should I do?