You can buy pyre logs at ge but also make them. To make pyre logs you need sacred olive oil that can be made from the Shades of Mort'ton. You will need normal olive oil to make this and once its made you then add it to logs. Some logs will need up to 4 doses of the sacred olive oil.
Pyres can be used in a mini-game for prayer and fire exp also if burned gives more exp than the original log of it's type.
magic logs. I think its 75 firemaking.
there are many places but if yiu really want to find them it would be in lumbrage or varrack
Chop trees. Logs, Oak Logs, Willow, Yew.
Cut oak logs
A scythe? Old runescape Easter event. You can't get one now.
Quite slim, but you still can get from them.
Teak Logs.
First, you have to be a full mem. Second, you have to have a knife and logs. All you do is use the knife on the logs.
Roughly 1.3million
It would take exactly 2555 willow logs.
Anywhere if you have logs and a tinder box, or on the various stoves