If u r talking about a dwarf cannon, then yes around 550K-850K
north of falador in front of dwarven mine
Not sure, I think you can but I have never tried it. Yes, you can.
The last answer was obviously posted by a loser :)
When your cannon fully degrades and disappears all you have to do is go back to the dwarf that u bought it from, and if you bought it of another player or G.E. Then all you have to do is go back to the dwarf you started the quest at. ( I forgot where he is so don't ask me )
If u r talking about a dwarf cannon, then yes around 550K-850K
in the cave next to the fishing guid.
to use the dwarf multicannon, complete quest dwarf cannon. to use the hand cannon, complete the giant dwarf. those two quests befriend dwarfs.
You need the cannon pieces to create one.
you cant shoot it at anywhere that have big things that block it
north of falador in front of dwarven mine
I don't think there is. But you can simply click on the cannon to fill it up.
no it cannot be lent because it is more than one piece.
Not sure, I think you can but I have never tried it. Yes, you can.
The last answer was obviously posted by a loser :)
Its about 450,000 to 522,000gp at grand exchange
No guns. One cannon and that's it, sorry. (EDIT) If you are trying to get the Dwarf cannon then you need to finnish the Dwarf Cannon quest. (members only) then you just buy it at the Grand Exchenge for around 500K (widely spaeking since the price changes) it requires cannon balls to shoot.