yeah ill do my best.
1. Try to save as many contacts to your e-mail as possible ( that way when you put in your LIVE ID all your contacts will re-sync
2. Apps and Games: Zune will Sync up SOME of your apps and games i think , but on most part your gona need to manually Download them one at a time. you can open up ZUNE to see your bill history so you know what you had before.
3. Music and vids will auto re-sync from your PC once you connect it.
4. To wipe your phone follow these instructions:
http://www.sprintusers.com/forum/showthread.php?t=218323 they have 2 way of doing it ,depending if u can access your settings or not.
thats prety much all you can do for now , simply re-enter your e-mails and let the phone do the rest.