What type of engine does it have?
The Pagani  has a
Mercedes-AMG M120 7.3 L V12 (2)

Another type of pagani has a 7.3L engine

Where were they made?

The pagani was made in Italy  they made it to be one of the fastest
sports car. By June 2009 206z zonda has been built.

How much do they cost?

They cost around 2.6 or 7 million.Others can cost 1.35 million

REFERANCES

http://en.wikipedia.org/wiki/Pagani_Zondahttp:/
/en.wikipedia.org/wiki/Pagani_Zonda
http://en.wikipedia.org/wiki/Pagani_Zonda
http://answers.yahoo.com/question/index?qid=20110609183840AAHrMox
http://www.egmcartech.com/2011/02/18/exclusive-pagani-huyara-price-starts-at-1-35-million-only-20-to-be-made-in-2011/