What is synced?
Are your notes synced with your Mac/PC's note apps?
Is your phonebook synced with Google, your Mac, Outlook, or Yahoo?
Your emails are stored on Yahoo?
There are ways to sync each and every one of these thigns from Google or Yahoo, or even from your Mac, to your Android phone.
* ie the Yahoo! Mail app will sync emails and the address book straight from Yahoo to your Phone.
* There are tools to sync Outlook contacts to Android
* Google of course can sync to Mac, and can sync easily to Android
Android can't talk with the iTunes backups of iOS devices obviously, that's proprietary Apple packaging. But whatever your iPhone was syncing with, whatever your computer syncs with, you can probably sync it with Android.