lol about 300 coins
Chaos alters let you make chaos runes assuming you have rune essense in your inventory and you actually are in the alter
You can obtain Chaos Runes from the Grand Exchange in Varrock for the best prices and also in bulk. It's also possible to buy Chaos Runes from Aubury's Rune shop for 140 gold pieces each, or by killing monsters in RuneScape. There are also some spawn locations for Chaos Runes with the most popular location in the Dark Warriors' Fortress.
when i pickup Chaos Runes, i would like to buy Chaos Runes from this site. you can visit it if you have interesting in it. http://www.runelevel.com
Mostly Fire runes but Law runes and Air runes are not far behind them.
You can find Nature runes by killing monsters, buying from other players, buying from the Grand Exchange, or making them yourself.
There is no staff like this.
There is the Giant Rock Crab in Chaos Tunnels ( Level 111-ish ) this is known to drop multiple runes when killed, but this isn't confirmed yet.
runescape
The answer is yes. You do need to supply your own runes.
infernal mages drop 7 blood runes and death runes commonly.dark wizards drop all runes nearly every drop.lots of slayer tasks will drop runes.Cockroach drones commonly drop air, water, earth and fire runes. Cockroach workers also (uncommonly) drop nature, chaos and even cosmic runes. Cockroach Soldiers drop death runes (and if your a member rare blood runes) and a few others. The flesh crawlers found in the second level of the Barbarian Stronghold commonly drop body runes. Level 2 goblins in Lumbridge drop water runes. Lesser demons drop fire runes: one trip can get you almost about 150 fire runes). Moss giants will drop the occasional 17 earth runes.For more info check out the RuneScape wikia.
Lesser Demons (combat level 82) provide a host a decent drops, including: -Death Runes (3) -Chaos Runes (12) -Rune Med Helm (rare) -Coins (up to 200gp) (rare)