TSA supplies complete information here for flights originating in the U.S.: http://www.tsa.gov/travelers/airtravel/prohibited/permitted-prohibited-items.shtm Also check with your airline's website for baggage restrictions and other passenger information.
The TSA has a comprehensive list on line. Check on their web site.
Yes but subject to security requirements at the time
Yes, of course it is illegal to bring BB guns on planes.
No.
Mice are aloud on some planes it depends what airline your on I would call them and ask what the rules are also I do know you have to bring some sort of files like adoption papers and stuff but yeah,
no smoking is allowed on public planes, national and international
Yes.
Yes
No.
if denture powder is powder than it is probly not allowed on planes cuz it might look suspitious.
Yes they are allowed. So their is nothing wrong with it.
2 suitcases are allowed in an airplane
They were searching thoroughly to check if the passengers were bringing things that weren't allowed to bring in. :)