You start off by picking up the odd gram or so from the people you kill and making deals with Small Suppliers and selling them off to Dealers and Fronts, but that isn't really going to be enough.
The Pumah is based on the Oldsmobile 442, it's commonly used by poorer citizens despite being a fast car, and commonly spawns at Little Havana and Downtown, the exotic version is unique, featuring matte black colour, two red and white stripes and a custom spoiler, while the NPC version spawns only in brown, without a spoiler. The Pumah is a muscle car and an exotic in Scarface:The World Is Yours.