I need to migrate data from one CiviCRM on Drupal instance to a clean one. HELP?
Before pronouncing the old database deceased, I would make sure the structure is correct and if not what is broken.  You can try this: https://github.com/progressivetech/civi-schema-harmonizer or http://wiki.civicrm.org/confluence/plugins/servlet/mobile#content/view/86213632.  The current dB may be ok.