Can I daisy chain a Thunderbolt display to a non thunderbolt display
The short and simple answer is:


Directly?  No.  You cannot daisy chain a mDP display directly off a Thunderbolt
display.
Indirectly? Yes.  You can add a single mDP display off another Thunderbolt peripheral (like storage or a dock)


This is coming off of Apple's Support page as of the time of this answer:


  
  Can I connect my Mini DisplayPort monitor or monitor using a Mini DisplayPort adapter to my Apple Thunderbolt Display?
  Mini DisplayPort Monitors or Monitors connecting with Mini DisplayPort adapters will not function when connected through a Thunderbolt Display. They must be connected directly to the Thunderbolt port on the computer or to a non-display device as indicated above.
  


(Emphasis mine)