I dont know much about individual clubs but I know that most of the Club Money comes from sponsorship and TV rights by Major Mexican Tv Industries... TV Azteca, Telefutura, Telemundo, etc...
The Mexican National team made 70 Million last year Mostly off of TV rights.
As to individual players
Sebastian Abreu defenatly ranks amongst the top international attractions in the mexican league (him and Palencia will be very dangerous in the Libertadores)
However there is also
Jose Saturino Cardozo- Paraguayan National who didn't appear much in the WC only because of the gratenes of Santa Cruz.
Alex Aguinaga- Ecuadorian Legend, and still a pritty good player..
Lipatin (I belive his first name is Mario but not sure) - Plays for club America, I belive he is also Paraguayan... Thats a few that I can remember perhaps others can remember more.