It depends, revolvers are much more reliable than semiautos due to their simple design, however revolvers shoot much slower and have limited capacities.
Basically, revolvers will fire 99.99% of the time and are easy to maintain, however in a fire fight or other self defense scenario a semiautomatic will be able to put more shots onto a target leading to a higher chance of incapacitation of the target.
My personal preference is a semiautomatic which i clean once a week to prevent jamming and misfires.
There is no better- some work better for some purposes than others. Sort of like which is better- a spoon or a fork?
Better is a relative term- you need to specify better for what. Semi auto pistols tend to be flatter than revolvers, and MAY hold more cartridges. Revolvers MAY fire a more powerful cartridge than a semi auto (not always). A revolver is simpler to operate, and functioning is more reliable.
Any .25 ACP ammo will fit it, however, Jennings handguns aren't known for being extremely reliable, so some brands may work better in it than others.
Yes, to some extent.
i think it is always better to go for whirlpool semiautomatic
yes
It depends on the handgun. Some are not good for much beyond arm's length. Of the pistols I have fired, the one with the longest range was a Smith & Wesson .38 revolver. Can't remember the model, but it was accurate to at least 200 yards, very good for a handgun. I have seen target pistols with adjustable sights which can certainly do better, but some of these are practical for nothing except target shooting. For an automatic handgun, 60 to 100 yards is probably the maximum practical range in the hands of someone who is skilled with it.
shotgun is better.
I don't know what you want to compare the rifle to, to list its disadvantages. Typically, people call most long guns a "rifle," as opposed to a hand gun (although almost all handguns have rifled barrels). In a firefight, advantage is going to be with the person who has a long gun (rifle)--especially a high-powered, semiautomatic rifle. Maybe concealing a rifle is difficult, and it is usually heavier than a handgun. So carrying a rifle isn't always practical. Most military people will say that you use your handgun to fight to your rifle. Meaning a handgun is better than nothing, but if you have a rifle nearby, you'd be better off using it.
better handgun skills.
Impossible to answer without more information.
Depends what your using it for hunting is the 12 gauge pump shotgun for home defense handgun