If I was a Citeh fan (I'm Liverpool as you can probably guess)...I would take Lahm, Diego from Juve, Di Maria and Villa or Aguero. I think all of those would be realistic options with the exception of Villa who has stated that he doesn't want to leave La Liga (worth a punt though). I don't believe you have any chance of getting Torres. I can't see him playing for another English team and there's no way he would go to Real Madrid so only Barcelona or Italy would be his destinations (in my opinion).

My dream team would be

Casillas
Maicon Vidic Pique Evra

Ronaldo Iniesta Xavi Messi

Rooney Torres

Obviously that team doesn't really fit a proper system but I believe off the top of my head that those are the best players in those positions in the world.