Unique Ability: Carnival
Ain't no party like a Brazilian party. While you're in a Golden Age, you generate double Tourism (the new resource used for cultural victory) and double your chance to get a Great Artist.
Unique Unit: Pracinha
A replacement for modern Infantry, these guys build up points toward a Golden Age every time they defeat an enemy.
Unique Tile Improvement: Brazilwood Camp
Starting once you research Machinery, you can build these on any Jungle tile. They generate two Gold and, once Acoustics is researched, two Culture as well.
Adviser T.J. says:
Brazil is one of those civs that isn't going to play a whole lot differently from most in the earlier eras. Other than maximizing your happiness to produce more Golden Ages (and taking the policies that make them longer and more frequent), the best you can really do is manage your city placement to get the maximum number of Jungle tiles. If you don't start off near many, that probably means you'll want to take Liberty policies and go crazy with those settlers. From there, start preparing to become a military power once Pracinhas become available. Use them wisely while they're relevant, and once they become outdated, you can choose whether to scale back the aggression and focus on culture... or keep blazing along the warpath.