Im a european citizen, from portugal
Altough did my private in brasil on Aeroboero, if you manage to fly without breaking it, your ok for all the other GA aircraft
Im probably going back in april to complete the instrument/comercial, and some flying in Argentina(cheap... and a xc flight to chile ) right now im in Texas doing JAA ATPL theory
I had to get a CPF number, even with tourist visa i got one
To be able to take a checkride i had to go back to portugal get a student visa, and get a temporary RNE number(foreign national registry), the actual card only arives almost 1 year later.
If you bring your pitts you will like the Acrobatic "scene" in Brazil, i do know some people that have pitts/extra/sukoi and can get your a good maintenance shop.
I think they will only do the licence for someone able to speak portuguese, while you learn it, you can easily get someone to use has pilot in command, even with a private pilot licence, if its a double seat
"Fica bem"