Working volunteer in Peru

[merinka]

Hi Mark, I am planning to go and work as a volunteer in Peru from September this year for several months up to a year. To be able to cover my living costs I would like to find another job, where I get paid. Do I have to ask for a work permit? Is it easy to go into coffee shops or similar - ask and actually get a short term job? I do speak Spanish, English and come from Central Europe.
What could be a monthly salary for 2-3days/week, I have no idea.
Any usefull tips you can give me are more than welcomed!
Gracias! Merinka