No. .357 Sig and 9mm are two completely different calibers and not interchageable.
No
No. 38 Special only.
a 357 cal. revolver cartridge WILL fit a colt 357 python. Also, a 38 special will fit a 357 cal. python. The 357 sig cartridge will NOT fit a 357 colt python................ The 357 sig cartridge ONLY fits the sig model pistol For clarity.....the sig 357 is a pistol. But, the 357 python is a revolver................
$200-$300, depending on exact model and condition.
Any .38 ammo can be safly fired in a .357. +P .38 loads do not exceed .357 pressures.
No
Check the frame
No. However, .38 Special ammo CAN be safely fired in a .357 Magnum firearm. Both cartridges use a bullet that is .357 in diameter- but the .357 magnum is longer, and more powerful.
No - they are very different cartridges.
A good pistol for a beginner would be a 22 cal. pistol. The ammo is cheap to purchase and this will allow you to get lots of practice without breaking the bank. A 357 Magnum is another good choice.
Yes, it can.
100-1000 depending on what condition of "average" you are talking about.