Can i travel south america on one visa?

hey,im still yet to leave australia but planning on moving to brazil and just venture off to other places in south america from there,If anyone can help me with a few questions it would be a massive help,
1)i have chosen brazil as my choice of preference to live, is it easy for australia to get a visa?
2)i dont want to work for a year..will they be ok with that?
3)which country would be the easiest for me to get my visa?
4)and does one visa cover all?
justsome random questions cause im not really sure where to start.thanks in advance for reading this.

Hi, it's quite easy to get a multi-entry tourist visa to visit Brazil. I say multi-entry so that if you want to visit other South American countries and return to Brazil, then you are safe. On a tourist visit you cannot stay more than 180 days a year, but this can be extended when it's closer to the 5 month mark.  You cannot work at all on a tourist visa, and it's not so easy to get a work visa without a job here in advance I think.