where can I rename Prefix and Suffix text in front for my customers...
in admin interface go to system->configuration->customers->customer configuration -> tab Name and Address Options. There you can define suffix and prefixes (seperated by ;)
go to Customers->Attrbiutes->Manage Attributes, search for suffix or prefix in grid, click row to edit -> go to tab Manage/Label Options there you can define localization by store
under theme design settings system / configuration / design