You will need to call S&W to find out.
Impossible to answer without a serial number.
No such weapon ever made by S&W
S&W never made a Model 359
This was made in 3 calibers- 9mm Parabellum, 10mm Auto, and .40 S&W.
You will need to call S&W
Yes. 9mm Luger is the 9x19 cartridge, also known as the 9mm Parabellum, and that's what the 9mm Sigma is chambered for.
9mm Luger. Ball or hollow point.
Either the SIG or S&W
Best left to a gunsmith. S&W will send you a owner's manual for free.
Recommend you find a good gunsmith or contact S&W and ask for an owner's manual.
You can download or request a manual via mail from the S&W web site
From 1976 on it will be part of the sn. For example 245RT01010 245 = 9mm RT= 1976 01010 = the 9th one made in 1976 Sns start at 01001 every year 245 = 9mm 2W5 = 40 S&w From 1998 on a 9mm would = 510