Karman talk to your doctor about your meds and tell him of your trip to Oz he should be able to help you there.
the baccy and papers cost now about 18 Oz dollars. Most brands like Winfield, Pall Mall Rothmans are availiable here. I do not smoke now but I remember when I first came to Australia I felt the Cigarettes drew to quick. A couple of puffs and it was gone. My Daughters partner did not like my New Zealand Cigarettes as he had to really suck on them.
Talk to a travel agent about insurance. They should be able to point you in the right direction.
Cheers
Cliff