See if you can recover the ID/password. Use every email address you can think of.
Apple ID - How to find your Apple An iCloud e-mail address is an Apple ID.
Apple ID - Find
If you forgot the Apple ID password, enter the Apple (iCloud) ID, and click Forgot Password. See if you can get an email option if necessary.
Apple ID - Manage
Apple ID – Forgot Password
Do, you have another device you can restore a backup to?
Restoring from a backup erases all data currently on your device. Any data newer than when the backup was made will be erased. A restore is an all or nothing restore. You can't access a back and only restore certain files.
Backup - Restore your device from an iCloud or iTunes backup.
If you were syncing with iCloud, also set up iCloud syncing to recover your data.