How can I transfer data etc.--programs, music, data files etc.--from my iPhone 3Gs to my iPhone 5, using iTunes on my Dell Windows Home Premium?
All of your data should be on your computer, if you are using the iphone as designed
Simply sync it to your new iphone.
See also Recover your iTunes library from your iPod or iOS device to recover non-purchased media that isn't included in the device backups.
Retrieving data ...