@jabbasoftdnaand: Please see the travel link on the TechEd Europe Website. Here you will find some tips on travel for the week. You will need to purchase your own Metro Pass for the event.
You can purchase discounted public transport tickets in advance here.
You can purchase Metro Tickets from the Metro Ticket Stand in Hall 2 at the conference center.
Note: The Campo de la Naciones station on metro line 8 is immediately adjacent to IFEMA. (Home to TechEd Europe this year). The Madrid airport terminals are also located on metro line 8. Journey time from the city center is approximately 30 minutes, depending on the number of line changes you need to make from the stop closest to your hotel.