I suggest you try one of these methods to recover your original Apple ID and password (which can be reset easily)
All of your past purchases are tied to the Apple ID used to purchase them. The ID can be changed in the account holders iTunes account.
About your Apple ID:
http://support.apple.com/kb/HT2204
Changing your Apple ID (new email)
http://support.apple.com/kb/HT5621
http://support.apple.com/kb/HT1920
http://support.apple.com/kb/HT2519
https://discussions.apple.com/docs/DOC-3991
http://support.apple.com/kb/HT5312
If this doesn't put you on the right path, holler back.