Yes. Possession of automatic knives in MO is now legal as of July 10 2012.
Carry of an auotmatic knife is also legal as long as it is not in violation of Federal law.
No
You can legally own them, however you would need a conceal carry permit to carry them with you
Yes, it is legal to own a Llama in the state of Missouri.
It's legal if its under 1.5 inches
Yes, it is legal to own a lock picking kit in Texas.
Yes
In St. Louis, it is illegal to own a slingshot or throwing stars
yes
Yes, Chinchilla's are legal in Missouri. Some towns or specific area's may have different restrictions on what pets are legal to own. I would check with an official in your area to make sure they are legal for you.
Provided all laws are followed, yes.
Any fixed blade knife is legal. The law for a folding "pocket knife" no blade longer than 3" can be concealed. Therefore it is legal to own any knife although you can not conceal (hide on your person) any non-fixed blade over 3".
There are semiautomatic versions of the Tommy gun (Thompson sub-machine gun). They are legal to own. A fully automatic Tommy gun is legal in Texas only if you have the federal license.
Kunai's are legal in the United Kingdom since there are gardening tools. You don't need a license for them.