The best way, if your a member is to craft them yourself. You could always buy them from shops or other players, finally many monsters drop them. in the wilderness there is a place where runes drop. it's called darrk warriors fortress. they drop there(water, fire, air, earth...) be careful for warriors(level 9).
you make chaos runes from the rune crafting skill you need level:35
then you get pure essences and go to the chaos alter .
you need to be a member to make them
you don't make money from it.
You can either runecraft them or buy them.
By killing certain monsters.
Chaos alters let you make chaos runes assuming you have rune essense in your inventory and you actually are in the alter
lol about 300 coins
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.
They could be anywhere throughout RuneScape.
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
Buy them from certain magic shops.Buy them from the Grand Exchange or from other players.Make them using the Runecrafting skill. You need at least 35 Runecrafting and must be a member.Certain monsters may drop chaos runes, but in low quantities.
read link below
Make runes. Air, Water,...
Check link below
To get runes, you can either buy them from the various magic shops around Runescape, on the Grand Exchange, or make them from rune essence and pure essence at the runecrafting altars hidden around runescape. If you need help, my runescape username is Xeyran.
South of the monetary and west of Barbarian village.
Mostly Fire runes but Law runes and Air runes are not far behind them.