You can legally transport it unloaded and inaccessible, but to have it loaded and accessible, you must have a NY handgun carry permit.
It depends on what you mean exactly. You can transport an unloaded handgun in your vehicle while you travel as long as the handgun isn't accessible to you. However, if you have a handgun carry permit, you can carry the gun on your person in some states. That said, you can carry a handgun on your person inside your car in some states without a permit. Check out handgunlaw.us for more information about each individual state's laws.
No such thing. ANY firearm, including high powered pellet guns CAN produce a fatal injury.
Unloaded and locked in the truck, with the ammo stored separately.
There are licenses and licenses. You can get a firearms owner's ID that will permit you to purchase and possess a rifle, shotgun or bb/ pellet gun at 18. A handgun permit is 21. A permit to CARRY a concealed handgun is 21.
shove it up your a**
It depends on what you mean. You can transport a handgun in the U.S. but each state has it's own requirements. The general requirements are, the gun must be unloaded and inacessible, however, some states allow people to carry loaded guns in the car. If you have a handgun carry permit, you can carry in some states. Again, you should check the state laws to see what the require in whichever state you are located or going to.
Only if you have a legal license
To my knowledge, only if you have a permit you can.
In plain sight.
It depends on how you are traveling. The law is different by country. The mode of transport is different for aircraft, car, bus, boat or train. How do you plan to travel?
No limit, however, you need to check the state law on ANY loaded handgun.