Moving to Curitiba (São Paulo)

All, I will relocating to Curitiba from US. Read quite a few things online about Curitiba and Brazil. Appreciate if anyone can provide any pointers or details on the following:

Rental cost
Safe for family ?
Average income range of Curitiba Population (banking if possible)
Life for Expats
Safe and secure place for expats to live
Driving license requirement
Public transport etc

Thanks
MM