Welcome! In answer to your questions
1) Not me I'm afraid
2) The Australian gap year visa is pretty easy to get and if you intend to work it is necessary
3)Depends on where you go
4)Again depends on where you go. Probably labour type work would be your best bet. For bar tending you will need to speak the lingo and know dialects as well.
It seems like a good idea though, wish I had the guts to do it
I have been to: Canada, USA, Iceland, Britain, France, the Netherlands, Belgium, Spain, Poland, Germany, Sardinia, Switzerland, China, Argentina, Brazil, Chile, Uruguay and Morocco.
Do to list: [color=blue][color=black] Australia, New Zealand, Austria India and Bolivia.
[color=blue][i][font=Verdana][color=black]"I'm just another stranger lookin' for the promised land"