Sorry, Clarification needed on my post.
I deleted applications that seemed non-native from the previous owner like limewire, Office 98, pagemaker. Was not easy as I had to "get info" to change permission to me on every app and folder from the previous owner to me before I could delete.
I also followed the procedure to add myself as a new administrator and then could only delete the former owner's admin function by logging on to the Root and then deleting the former owner.
Interestingly, even though I deleted this previous owner, I had to "claim" his old files as my own before I could delete them.