You need to stand on red pentagram-like magical symbol on a floor/ground.
Using a rune will pop-up the dialog window with "choose destination" options.
After receiving first teleportation rune in Silbach, ask Lokvar about it.
After speaking to him you'll:
All teleportation runes merged into single in your inventory.
Transport system at Archolos consist of:
Telerune: from Rupert as result of completing the quest "nobody gets left behind".
Portal whereabout: the cave.
Telerune: at Silbach's chapel on the altar.
Portal whereabout: chapel of Silbach. Interior of the chapel can be accessed via third part of the quest "three works for the alchemist" (cleaning the chapel of "monsters") with the key from Lokvar.
Telerune: You can buy it for 100 GP from the miscelaneous trader in the western cave of Scoundrel's Haven.
Portal whereabouts: Behind the tents opposite the entrance to the Harbor.
Telerune: right on the floor near portal.
Portal whereabout: in the ruined tower. Tower is guarded by 2 harpies.
There is also some loot behind the tower and to the left of tower.
Telerune: buy for 100 GP from water mage Laudus in the Temple of Adanos.
Portal whereabout: in the Temple of Adanos.
Telerune: need to kill warlord in the cave and take the rune from his corpse.
Portal whereabout: in the abandoned cave guarded (inside and outside) by 25-32 lvl bandits: warlord and 6 "common" bandits.
This bandit camp and cave contain many valuables: good weapons, ring, 2 silver deposits and so on!
Telerune: right on the central stone platform in the stone circle.
Portal whereabout: stone circle in front of Amber coast.
Telerune: Inside of the Monastery territory near the main gates there is tower, rune is on the table. Interior of the tower becomes accessible in Chapter 5, when you going in for the chest with your items.
Portal whereabout: Portal is in a small shrine, between the gate and proper monastery.
Telerune: in central sarchofagus near the teleport.
Portal whereabout: cave in the forest south-west of bridge (with the boat) by the road between Silbach and Rita's Vineyard. Cave is guarded by 3 goblin-skeletons and 3 skeletons.
Telerune: NO RUNE,
Portal: small cave at northwest side of that small island. Island is located southwest of Volcano.
Telerune: buy for 100 GP from fire mage Tengral which is inside of the great chapel of Innos at the nortwest of the City.
Portal: in the small chapel of Innos just several steps west of Barracks at center of the City.
Telerune: in the basement on the barrel near portal.
Portal: in the basement of your house.
N.B. There is NO ACCESS to area until late part of Chapter 3. House can be obtained in Chapter 4.
Telerune: buy for 100 GP from Yezegan.
Portal: before the room of Yezegan.
Telerune: in the iron mine, left of the portal pentagram in the drift with two skeleton-archers.
Portal: in the iron mine, near entrance. Iron mine located in the northeast of the Swamp, among several burned buildings.
Telerune: in the left room after you open and enter the gates of the fortress, on the alchemy table.
Portal: at the courtyard, in front of entrance.
Telerune: in the room to the left of entrance, on the table.
Portal: right after the entrance.
Telerune: NO RUNE.
Portal: dead end of right arm of the cave.