Finding the salary range depends on the type of job you'll be doing, and the location in which to work. A good place to start is to look at listings for the type of job you're looking for in the sort of location that you'd be willing to work in. Job advertisements can often list the pay being offered. For example, several General Practitioner and Emergency Room doctor jobs on All Jobs Health - http://www.alljobshealth.com.au - list the pay being offered. By looking at a range of roles, you'll get an idea of what sort of salary you could expect.
As always, ensure that you do your best to negotiate for a great offer which suits your specific skills and experience.