First, you obtain a Type 7 or Type 10 FFL with Class II Special Occupational Tax Stamp. Without this, conversion of such a rifle (such actions are considered manufacturing) is highly illegal, and answers providing a how-to guide on committing illegal acts are not allowed here.
Marlin made the model 922 in the early 1990's
Possible, but, not likely
No. Yes they do: Marlin 917VS rifle
its a controller where if u had a single shot rifle on a game would make it fully automatic
yes
Marlin and Ruger are two.
No
If it wasn't originally designed as an automatic then it can not be converted into an automatic
No.
Yes. The Camp carbine.
Fully automatic shotgun, no. Automatic rifles and machine guns, yes.
No you have to pull on the trigger every time you want it to fire. But you can easily make it fully automatic.