Short answer: no TAFE course will qualify you directly to be a school teacher but....
Long answer: You may be able to do a TAFE course (usually Cert IV or higher) and get credits for a uni course (usually in place of the electives, see UNE's Bachelor of Teaching/General Studies) later, but you still have to compete with others for entry. The Cert IV in Assessment and Workplace Training (actually they have a new name for it now) isn't really about education, it's about training (which when you start to study an education or teaching course they explain the difference), but if you want to be a TAFE teacher - yeah go for it. There are numerous streams in the Cert III in Education Support (to be a teacher's aide) which might help you decide if it is the career for you or else keep the $ coming in whilst doing your teaching degree later. You can do the Diploma of Children's Services (basically trains you to work a childcare place) that usually wipes out a year or more of a Bachelor of Early Childhood Education which may qualify you to work at a Primary school (if it is a 4 year course and there is sufficient focus on 5-8 year olds) as well as preschools.
Check out open uni's (
www.open.edu.au) as they are going to offer a Primary Education degree for the first time next year (through Monash uni, from memory, or else maybe Curtin) which has no entry requirements (although they do have a quota for that particular course). You can enrol in some Arts/Science/Business/IT/Psychology or something subjects to improve your prospects in gaining a place in the one I mentioned above or else a direct-to-uni normal place, plus probably would get credit so you aren't wasting any time. It's often easier to get credit for uni level work than tafe level work because the vocational competency based training system is quite different to uni learning so I would recommend looking at Open Uni's.
Hope that helps.