No, not by a longshot (no pun intended). Almost all "major" caliber handguns are more powerful than the 9mm.
A 9 mm handgun can cause a lot of damage to someone's chest and abdomen. A 9 mm handgun and kill someone.
Yes
Point it at what you want to hit and pull he trigger.
9 mm
In my opinion, yes.
200
i recently bought a 9mm tanfoglio handgun for 350$ it was used but had never been fired
100-300 or so
No. Only use what is stamped on the barrel.
100
In good condition; up to $3000
"Powerful" is somewhat of a subective term, but the answer is yes. 5.56 is a rifle cartridge and 9mm, assuming you mean 9mm parabellum, is a handgun cartridge. Under normal circumstances, bullets fired from rifles will have more velocity and more muzzle energy than bullets fired from handguns.