When I was in italy I went to Maranello and went to the Museum.
Its pretty cool and all the cars there are not donated by Ferarri, but bought by the museum itself.
It has heaps of new and old cars, heaps of the F1 engines and also heaps of cut aways.
Its pretty cool and worth the while if you are in the area, but i wouldnt make a special trip.
I am not sure if you can go to the "factory" itself. As for getting there, we were in a car so we drove so i cant give any directions or anything, sorry bud.