If you're coming by train to Modena, then you have to take a bus to the bus station and then a bus to Maranello.
Take a bus from the Modena bus station. The bus to Maranello leaves every 1 hour and takes about 30 mins. Be sure to ask the driver to stop near the Ferrari museum.
The new Maranello bus station is near the Ferrari factory main entrance, but on the opposite side from the museum (1 mile far).
For Ferrari museum tickets owner there is shuttle that connects the Ferrari museum in Maranello, Enzo Ferrari museum in Modena and Modena's train station.
The town is quite compact so you can walk.
This town is all about Ferrari. The Ferrari factory is off-limits, unless you are able to arrange a tour through a Ferrari dealership. Preference for those tours is given to Ferrari owners and 30 days notice is usually required. Daily there are some public guided tours who bring you not inside the factory, but to visit the buildings of the factory and the Fiorano track.The Ferrari Museum boasts both historical and new Ferrari road and F1 cars is worth seeing. You can also see a part of the Fiorano test circuit from the roadside when coming into town - if there is testing going on, expect to see a lot of "tifosi" (Ferrari fans) around.
The factory (and the Fiorano track) can be visited with an official tour organized directly by the museum and can be booked online in the museum website.
Another activity greatly appreciated in Maranello is the short term rental of Ferrari cars.
Maranello is in the middle of an area famous not only for supercars, but even for foods, castles and culture. Around is possible book a visit to Parmigiano-Reggiano dairies, Traditional Balsamic Vinegar producers, Parma or Modena ham producers, Lambrusco cellars and lots of traditional restaurants. From Maranello several tours start to visit the area: one of the most active tour operator Motorsport Travel, who organize even the car rentals.
There is lots of Ferrari merchandise available everywhere.
Lots of great restaurants in Maranello. Like in most smaller towns in Italy, they are only open for a couple hours around lunch and dinner usually starts around 7pm or later. If you happen to miss lunch you're generally out of luck until the earlier restaurants open up for dinner.
Local specialties to try at these restaurants / in the area:
Most restaurants will serve you coffee after your meal. There's a couple of cafes that primarily serve coffee if you want a more authentic experience:
Don't expect these cafes to serve you American style drip coffee. You basically only have a choice between an espresso ("normale"), a machiatto (espresso with a little bit of milk), and a cappuccino. Some will serve you an Americano (referred to in Italian as "dirty water") with a look of disdain and a slight loss of faith in humanity.
Find a pub - not difficult.
Your options are better in Modena