You can't right now.
Tobex is now known as RS-PS. They provide web clients which are used to connect to a server and play it. In order to have your own server you must be running a server. you may want to take a look at Moparscape, Rune-Server, or RuneLocus for help on starting a server, or the rs-ps forum for a tutorial.
you get agility exp and when you lvl up, you can run longer
Yes.
Agility exercise is an exercise that increases your speed and co-ordination. So at first agility exercise can be tiresome, but once you build up your speed it should not be as tiresome.
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
Agility training is for maneuverability and the quality of the speed you can deliver. A very important property for a basket ball player. You can learn more about this by looking up some video's at youtube and search for agility skills.
move with agility
No. Even the lamps don't work.
Agility was not invented. Agility is something you are born with.
A side step is an example of 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.
It levels up about 4-6 lvls.