Part time jobs in sydney

I'm planning on moving to Sydney for a few months for an internship.  It is unpaid, so I would like to find a part time job to pay for my expenses.  How easy is it to find a part time job around february/march?

Hello - February / March is summer time in Australia and its easy enought to get part time work. What exactly are you looking for? To work in a bar in Australia you must have an RSA card, (Responsible Service of Alcohol).  It looks better if you have this before you go for an interview, as you will not be permitted to start work without it.  It's a one day course, and it costs approx $90-$100.

and does anyone know what type of visas are required for that type of jobs?

I meant type of visa sorry :p.