That depends on your parents and local law enforcement.
It depends on the country that you live in. In the USA their is no age limit to use an Airgun. However in most states you must be 18 to purchase one. in the UK you have to be with an adult until your 14
Yes.
to many deaths from the use of them
Yes it does and it will eventually destroy the seals. Never use and oil on an airgun always use Crosman Pellgun or RWS oil they are designed for airgun seals.
Only if the airgun has a scope rail designed into the gun. You will also need an airgun scope not a firearms scope.
You can't it's not designed to be a repeater.
Unfortunately the serial number doesn't help to identify the model. I need the model number to determine the age of the airgun. BSA ( as far as I know) only made 2 airgun models but made several different rifles that were under-lever models.
The highest velocity of an airgun is that of Evanix AR6 pistol which is 1000 fps.
If you mean to purchase Airgun's and airgun accessories, I think Airgun depot has great prices and fast shipping. Pyramid Air is very good as well I hear.
The address of the Daisy Airgun Museum is: 202 W Walnut St, Rogers, AR 72756
I clean my rifles around every 500 pellets or sooner if I think they need it. I do have some suggestions for cleaning. First of all never use regular gun cleaning products. the cleaning agents will damage the seals in the airgun. Only use Crosman pellgun oil or RWS airgun oil to clean and oil the airgun. You can purchase cleaning pellets from "pyramyd air, See Link Below" to clean out the barrel or purchase a airgun cleaning kit. Add a few drops of airgun oil to the working parts of your rifle. Put a small thin sponge in the bottom of your pellet tin with a little pellgun oil to lubricate the pellets, This will coat your barrel on the inside. Don't over oil the air rifle.
Yes, As long your air gun is not very loud and you dont damage neighboring property.