Am I Eligible to apply for studying in Australia?

I am from Bangladesh. I have completed my GCE 'O' Level / GCSE Examination at 2001 in 6 subjects. I have done IELTS and scored 7 in July 2008. I am a patient of Diabetics and due to my medical treatments I was unable to proceed with my further studies after 'O' Level from 2001 to 2008. But, currently, I am studying in a Diploma Course of Software Engineering for three months. I also have some work experience. My question is, now at this moment am I still eligible to continue my further studies in Australia, i.e. in any vocational courses or foundation course. My sponser will be my parents and they have sufficient funds. I also have a wife but no children, can I take my wife with me. My country is under essment Level 4, which requires me to apply for a course in Australia for a minimum duration of one year. Please help me with information. I want to get a degree from Australia because it will be world wide recognised and I like this country and also I will be able to do better medical treatments for my Diabetics.