No
The law is a bit complicated. Basically, your car is considered an extension of your home, and you may have a firearm in your car. However, there are still limitations. I would urge you to contact the Louisiana State Police for accurate information.
Yes
Yes
Provided you comply with all local, state and federal laws; yes.
If you can legally own a gun, you can carry in Alaska. See related link for more information.
Yes, you can carry a gun in your car in Oklahoma. However, it can not be loaded, and it must be kept in a case with all or at least part of the case visible.
In PA you have to be 21 to conceal carry (or carry loaded in your car) a handgun.
If you carry a gun you can stop car jacking.
Yes
Any car that you can own that you only carry liability insurance on.
A person may carry a concealed, loaded handgun without a permit while in or heading directly to a car they own or control.