Runecrafting the runes is your best bet, or buying the runes from GE, players or Ned in Varrock.
Crossbows can only fire bolts, not regular arrows.
Bolts of cloth cannot be made by RuneScape players. They are purchased from the Sawmill Operator northeast of Varrock for 650 coins each. Bolts of cloth may also be purchased on the Grand Exchange.
Fire giants are level 85 in Runescape 3. They grant 424.8 experience points per kill.
you can either go to the grand exchange near varrock or enchant them from buying regular diamond bolts which are from adamant bolts
you can make about 2000 in one hour
you can buy them on the grand exchange or kill different things that drop bronze bolts the following drop bolts a lot Highwayman Imps Goblins
level 86
You can't make bone bolts, you can only buy them off other players or at the Dorgesh Kaan shop.
you can use them with iron crossbows or better
The fire obelisk is located in talvery dungeon west of black dragons.
they are lvl 103
An accumalator is a backpack in runescape that saves arrows as you fire them.