Yes.
Not to consume on the flight.
Probably, but they might want to inspect it first.
no, i can not
Paper, because it is much lighter, and a foil airplane will take up much more mass.
You can carry cigarettes (& cigars) on an airplane however there is no smoking allowed on board.
I doubt it very much.
Yes. You can take any prescription drug on board provided it is properly labeled, in your name. Now if you mean can you take a Viagra on board? sure, if you want to join the 'mile high club' and need Viagra to do so
If they are commercially packed, yes. Otherwise, they will be confiscated on the airport.
If the coffee is sealed in a retail pack many airlines will permit you to board with it in your luggage. On arrival at destination you should declare it as a food item as most countries have regulations regarding import of food products. This is to safeguard against importation of pests and diseases and sometimes to protect local industries.
Yes, you can take airplane blankets with you on your flight.
I would ask a pilot