Depending on the citizenthip of the succesful applicant, there are two possible tuition fees:

Scholarships
In this section ("Fees & Scholarships") you will find information dealing with the following scholarships:
Erasmus Mundus Scholarships. Category A & B (European Commission) +info
Excellence Scholarships (EMTTLF Consortium) +info
SYLFF Fellowships (Tokio Foundation) +info
Erasmus Mobility Grants for the Second year of the Master (European Commission) +info
Private Institutions Grants for Spanish Students (e.g. "Fundación Caja Madrid" & "Obra Social La Caixa") +info
Spanish Government Grants and University Loans (Spanish Government) +info
Other Financial Aid (Basque Government and other Scholarships) +info
Please, read carefully all the information dealing with sholarships, specially the document entitled "Additional financial aid information" available at "Other Scholarships" section. Applicants are encouraged to seek financial aid and scholarship funds from sources in their home countries. The EMTTLF secretariat will deliver all the necessary documentation you may need for applying to any financial aid or scholarship programme.
Note that, as for the first, second and third editions of the EMTTLF (2008/2010, 2009/2011 and 2010/2012) 97% the participant students have been awarded some kind of scholarship (from public or private institutions).