When you arrive at the airport, directly in front of the exit you will see a number of buses. You need to take a bus that goes to Milano Centrale (which is the main train station in Milano). There are a few buses that will take you there and they leave very regularly (every 15 mins or so). One is called "Malpensa Shuttle". This trip is about an hour long and you can buy tickets on board.
When you arrive at Milano Centrale train station, you need to go into the main hall where all the platforms are and buy a ticket to Alessandria from the ticket booth (a "biglietterie" in Italian). Note that as there are no direct trains to Alessandria, you will have to change at some point in your journey. We will post more detailed information about this shortly. Watch this space!
