You can't change weapons. You automatically use your best ones.
Mugging.
To get the best weapons on Mafia Wars you have to use rewards points to buy them when they have special reward offers. A: or You can get loot from jobs ar-15 is pretty good
From any weapon you have, if you are fighting or defending you always use the best there is without manual choice.
After attacking a property in mafia wars, it will give you an option to use a burner if you fail
To change your wishlist, you can either go to the collections, or your "loot" page and click on the "add to wishlist" button.
yes the items that are not any more of use or the items that are required for jobs that you already finished because they have no more use for you and they add to your upkeep.
Generally speaking, you'll use your 8 best weapons in a fight and everything else will just sit there and not help you at all. There are some game mechanics that may lead to lesser weapons being used instead, but it won't make much of a difference.
you cannot use the robbing mode in mafia wars since it is disabled by Zinga a few months before.
mafia wars
There is a glitch you can use to get the bonus weapon on Mafia Wars but you wont be able to use it in fights. It basically will just be there for show because Mafia Wars made it so you couldn't use it and other then that you will just have to keep leveling up and get to level 99 to get it.
upkeep is how much your weapons use eg a chain gun has an upkeep of 2,500 because you have to keep on buying the bullets, a car needs gas etc
use energy boost.