You can buy it on the grand exchange.
A normal cannon No, but you can use a hand cannon at your own risk that it could explode whilst you are trying to kill him.
No store in Runescape does such.
to use the dwarf multicannon, complete quest dwarf cannon. to use the hand cannon, complete the giant dwarf. those two quests befriend dwarfs.
no, the cannon can't be used in the wilderness
Click Set-up cannon stand. Your RuneScape character will automatically set up the rest.
no
It is not known who exactly invented the hand cannon but it is thought to have originated in China. The hand cannon is the earliest firearm.
If u r talking about a dwarf cannon, then yes around 550K-850K
About 346 gp each.
To Set up the Cannon: Just have all the parts inside your inventory, and click on the cannon base. Your cannon will set up automatically. To Load The Cannon: Press "Fire" on the cannon when it's set up.
I don't think there is. But you can simply click on the cannon to fill it up.
Yes you can own as many cannons in runescape. But it will only let you set out one cannon only.