Yes you do. Also a recent law requires all owners of PCP air rifles to register them. ( High powered air rifles.)
See the link below.
It all depends on the Country and location where you live. In the USA you must be 18 to purchase a BB gun, but no permit is required to buy one.
No, you do not need a gun license to buy magazines.
No
yes
No
No.
no
No.
No
Yes, you do not need a gun license to buy a clip, but you may need one to legally possess and use it depending on local laws.
No
no