Your local police can assist you.
Not if you follow the laws.
probably not
Your local police can give you the current information.
Yes, if you follow the laws
Since you posted the question on the internet, do an internet search on Maryland gun laws.
It's up to your parents and the laws of the country where you live.
If it was illegal to discharge a BB gun then they wouldn't make BB guns. So the question is, Where is it legal to discharge a BB gun? Every state, city or country has different laws about BB guns so it is best to check with local law enforcement or city ordnance's to find out about where you want to shoot.
Depends on the parents and local laws (if any).
It depends on your local laws.
http://www.nraila.org/statelawpdfs/MDSL.pdf
If its a BB Gun, Then Yes.
It depends where you live, and what the laws are for using BB guns on small animals. Usually it's not unlawful to use a BB gun on small animals like rabbits, squirrels, pigeons, etc.