Hi Chloé,
Take it from me, I've lived in Brazil (in 4 different states) for 13 years now. Lived in São Paulo (zona oeste) and in Belo Horizonte. I had a couple of cars in my time here and gave them up, quit driving years ago. Car ownership in this country is just a colossal pain in the butt and too expensive unless you either have a car provided by your employer or you REALLY NEED a car because it is part of your work and you can't work without it. (I don't mean just to get to and from work, where it's going to sit parked for 8 hours either!).
I lived for several years in São Paulo and went everywhere imaginable in Greater São Paulo without a car, took longer yes - but it was 10 times cheaper than owning a car. What I saved by NOT OWNING a car I used for taxi fares when I absolutely couldn't get by without wheels. I still saved a fortune! I came out on top, without the expenses, without the taxes, maintenance, parking problems, worries of vandalism and accidents, etc., etc., etc.
My firm advice to ANYONE thinking about buying a car here in Brazil is to really consider well if first of all you REALLY NEED a car, or if you're just so used to having a car you don't think you could live without one. The costs are horrendous and they don't stop, they don't reduce, not ever. In major Brazilian cities the public transportation system is pretty crappy I know, but it still works reasonably well. Get a bike and use it, or walk for short distances... God how we get so reliant on just hopping in the car to run down to the corner store! Taxis are relatively cheap and if you only use them infrequently you'll save an absolute fortune.
I rarely even used a taxi when I did massive grocery shops! Big hint here folks... most supermarkets all over Brazil deliver right to your kitchen (free of charge or for a very low fee) everything that you've purchased. So you take the frozen stuff with you, walk home and wait for it to arrive. One less time you've though you needed a car. POW!
Just think, car ownership involves:
IPI
IPVI
DPVAT
Licensing fees
Vehicle inspections in many cities
Drivers licence / auto escola, etc for anyone in Brazil over 180 days you need a Brazilian CNH
gas & oil
tires
maintenance
parking
insurance (one of the biggest rip-offs in Brazil, doesn't cover anything)
traffic headaches
potential theft and maybe even getting killed in the process
fender benders and more serious accidents
Traffic fines from radar cameras set up in locations that are "fine factories"
Traffic fines from cloned vehicles that YOU end up responsible for
Road rage incidents (potentially life threatening)
You don't have any of that s___t if you don't have a car! Think about it.