I'm relatively new to Ferraris also. I'm a long time Jaguar guy. I went through the same thing with those cars. Each marque has its own nomenclature and shorthand. I'm starting to figure some of these out.
"QV" means Qauttrovalvole (4-valve per cylinder engine)
Name origins, haven't figured out yet, other than is seems like Ferrari did what most other manufacturers do -- they pick names or numbers for their cars that say something about the car, the engine, or just an interesting sounding designation. Mine is a Mondial Quattrovalvole. Mondial means "world" I think. Some of the other models are named for Italian towns (Modena?). Just guessing here. I'm sure if you pick up one or more of the many books out there about the history of Ferrari, you'll learn something about the way the numbered and named the models.
In the meantime, just enjoy the cars.