Agility is levelled up by going to Agility courses and maneuvering through the obstacles to gain xp. The first Agilty course if your level 1 is at Gnome stronghold and the max xp/hour is 9k
You go to an agility course. There are several, choose one according to your level. Since I suppose you are just starting, go to the agility course south of the Grand Tree.
Yes.
Go to the course closest to your level. If you are level 1 go to the gnome course!
Even around level 70 you can rarely fall into the pit.
you get agility exp and when you lvl up, you can run longer
its highers your your agility level for a certain amount of time. It can be used to pass obstacles that might be otherwise too high for your level
Really depends on what skill. For mining, agility, and firemaking, you want a penance horn for double xp.
No. Even the lamps don't work.
It temporarily increases your agility.
No, However boosts like Agility potions and Summer pies can be use. An Agility Potion will raise your agility by 3, meaning if you are level 53+ agility you can use this. A Summer Pie will raise your agility by 5, meaning if you have 51+ agility you can use this.
The brimhaven Agility Arena.
train...
There are a lot of places that agility is used in. You can use them for shortcuts in the game or it is used for you to run longer and your stamina recharges faster. If you need to see were these shortcuts are, open the skill box.