I received a doctorate from an online school Walden University. I have not had any luck finding a full time college teaching position. Should I pursue another Ph D from another reputable college? Can I use any of the coursework I already have to defray the expense?
Without knowing the accreditation your University has, it is safe to expect a lot of schools to question it. With Master's programs sometimes, you can get away with online because it is very knowledge specific, however, PhD's have other factors that are expected of recipients that almost always require a physical institution.
Sometimes you can transfer course work, but many Universities won't accept it.