Walther, Colt, Ruger and S&W are good places to start.
Nothing. However, a Bernadelli 380 would be in the 10-200 USD range
50-175
Gun shops. That can include SOME sporting goods stores (that have a dealer's license) and SOME pawnshops (that have a dealer's license)
the 380 is a 9mm short
It depends on the model, but most handguns will have a takedown lever or pin of some kind. Check the owner's manual for the particular model you have.
100-1000 depending on exactly what you have, its condition, box, accessories, papers, engraving, etc..
I don't know if it's the smallest, but the Kahr P45 is pretty small.
The value of a Titan handgun 32 cal is $159.99.
Impossible to answer without more information.
No.
NO
No.