Sadly this isn't possible as Apple want to make a profit from the music they sell.
You can use Dropbox, Dropbox is able to open some formats of video or audio files on your iphone. However, you cannot save these files to your iphone Music or Video without using iTunes.
updating your iPhone should not affect your music, but if it does, you should have a copy of your music stored on your iTunes authorized computer. If you purchase your music on iTunes, you should have a copy of all of the music you ever purchased in iCloud incase you lose anything. I think manually managing your media on iTunes has something to do with losing your music after updating.
you can save it from itunes directlyconnect iphone/ipod to pc and run itunes and select apps and view files and choose save
Yes. I bumped a photo from my ipod 4th gen to an iphone 4 and then vice versa.
To save images from google earth on iPhone simply press the image and you will get the save option.
Yes, you can use the iPhone PC cable to copy music from your iPhone to PC.
You have to convert the music into an ACC format than sync it to your iPhone
You buy music through the iTunes store and download it to your iPhone.
After you buy the music in the itunes store you have to sync it.
The iPhone should take the same type of music that is on your iPod. There should be no need for a conversion. Right, If they are of the same format, then you just need to copy the music from ipod to your iphone. Yet if you have a iphone video converter, then you can converter almost all popular formats of music from PC to you iphone
you dont have to save it, it automatically does :)
A tool named EaseUS PhonTunes can transfer music from iPhone to computer.