Can i transfer purchases from any iphone to my itune?

Open iTunes. Connect iPhone to computer via usb/fire connector. Check top of iTunes screen for your iPhone. Click on it.

If you'a an iPhone user, you can use iTunes to transfer music from iPhone to computer first. You may have well known that iTunes only transfers purchased items from iPhone to iTunes library, so iPhone users can move purchased songs from iPhone to iTunes library.

1. Run iTunes and click "Edit > Preferences > Device > Prevent iPhones, iPods and iPads from syncing automatically" at the upper left corner of iTunes window.
2. Plug iPhone into computer via the USB cable, and then click "File > Device > Transfer Purchases" at the upper left corner.
3. iTunes will start to sync all the purchased items back to its library.

After the syncing process, you will get the music files in your iTunes library, including the purchased music files. You are able to find the music files in the folder of your iTunes media files on your computer.

The next step is really easy. Since the music you want is already saved on your computer, you can now simply connect your MP3 player, drag and drop to transfer songs.

On the contrary, here's also a guide about Three Ways to Transfer MP3 Files to iPhone in case you need help.

First, merry Christmas! if you hope to transfer files from your iphone to computer, iTunes cannot do it,

you can use some app to do that, as for me. I used iStonsoft iPhone to computer transfer for one year, worth recommend.

but what system are you using ? PC or Mac ? if you 're PC user, here is the method: how to transfer music/photos from iPhone to coputer.

if you 're Mac user, sorry, I also am not familiar wtih Mac os.

hope it can help you !

You can choose iTunes to sync iPad with your Mac, but you should be careful when you are using iTunes to sync iPad. iTunes is not simply backup or transfer software, and it doesn't allow you to transfer non-purchases. So you only have authority to sync purchased items, including apps, music, movies and so on to your Mac or iTunes library. Check out the following steps.

1. Authorize your new computer to use your Apple ID. Install iTunes on your new computer and then Authorize it in the Store tab.This is the email address you use to sign into iTunes (and probably anything else Apple-related). If you don't know it offhand, you can just check the computer you're currently syncing with. If you go into the iTunes Store it should appear in the upper-right corner. Once you know it, go to the new computer you want to sync with and locate the Store menu. From there, choose "Authorize This Computer". (In the event you've switched Apple IDs and made purchases with more than one, you'll need to perform this authorization for every account.)
2. Back Up Your iPhone. Just in case anything goes wrong when you are syncing, back up your iPhone, so that if all else fails, you'll be able to restore it to the way it is right now. To do this, connect your iPhone to your computer with its USB cable and open iTunes, Click "File > Device > Back up".
3. Transfer Purchases from your iPhone. Now you'll want to transfer all of your iTunes purchases (including free apps, paid apps, songs, books and movies) from your iPhone to your new computer. To do this, right-click (CTRL-click on a Mac) your iPhone within iTunes and choose Transfer Purchases. Or click "File > Devices > Transfer Purchases from my iPhone". Then iTunes will start syncing the purchased items to the library.

http://www.leawo.org/tutorial/how-to-sync-iphone-to-new-computer.html

You can't normally take music off a iphone or ipod with itunes (is a one way street)

but try this

http://lifehacker.com/394046/copy-music-from-your-iphone-or-ipod-to-your-computer-for-free