Blue Book of Gun Values is a good place to start.
Owner's manual.
Start at your local library
What are the markings on the pistol?
BLue Book of Gun Values
I luger is a type of pistol used by the German army during WW1.
I can not find any information of a Daisy model 653. However Daisy did make a model 693 BB pistol. Is this the pistol you are referring to?
This site will explain how to strip your pistol. http://www.thehighroad.org/archive/index.php/t-129970.html
You will need to start by contacting Mauser
Standard Catalog of Smith and Wesoon by Supica and Nahas
Blue book of gun values
Made in Italy. 50-150 USD
You can find information on how to make a gun online on Youtube and also at Wikihow. You can learn to make a 22 pistol and also you can even learn how to make a machine gun.