The pics are from a new book about Papa's childhood and youth called "Ich werde mal Kardinal" ("I will be a cardinal when I grow up") by Johann Nussbaum. About the pic of young Joseph in what appear to be Bavarian style leather pants: The author showed it to Msgr Georg Ratzinger who confirmed it depicted indeed Joseph, but that the pants were not leather because that would have been too expensive. The other photo is an enlargement of Joseph in a seminary group photo of 1947.