Click Inventory, then Collections & Vault. Now scroll through the list and look at the title of each collection. Right next to the title is the name of the job tier that will give you those items. For example, next to "Diamond Flush Collection", it says "Street Thug Tier". That means you have to perform jobs in the Street Thug tier to get Diamond cards.
Enforcer Jobs
http://mafiawarshelpsite.com/
Looted items in Mafia Wars helps you to win more fights if the looted items are better then your current items you already have.
You cannot gift some special items in Mafia Wars. You can check out my site for more guides on Mafia wars and other facebook games.
no
you will get rare and uncommon items.
Jobs
If you search mafia wars wiki, it is the most comprehensive mafia wars info site on the internet. They keep it very up to date
no you cannot delete them but if you want to get rid of the loot items, you can send them to your mafia family members.
Why yes, yes you do.
You get looted items when you fight other mafias and win.
No there isn't any teddy bears on Mafia Wars as loot or vault items.