Send it back to the maker.
Naturally.
Yes.
100-200
100-1000+ depending on exaclty what you have.
50's or so
50-100
One can be made
You have a Grade I Browning takedown semiauto .22 rifle made in Japan in 1986. Browning offers a scope mount for that rifle, their item #12333. Aftermarket mounts are available from Leupold, Burris, etc.
Try these websites ......WWW.cheaperthandirt.com.......WWW.gunsamerican.com
It'll work just fine.
50 or so
Yes, but you have to drill and tap.