So far i only have one Teleporter stone....Is there a way to teleport out of the dungeons so i don't have to keep walking back?

Until you find the other Teleporter stone you will have to walk out, sorry.
**Spoiler**
There are exits back to upper levels in the catacombs. Look at this walk through if you need some hints. Be aware that it contains many spoilers.

Use the teleport stone to teleport to the other stone, grab it and use it to get out as fast as you can because you will be teleported into a very hostile environment.

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I stand corrected.

NP

I was going by my own play style where I never teleport to the other stone as I prefer fighting my way to it. I always arrive at the other stone with one stone in my possession since I rarely use them . . . =)

I love these stones and think it was the best implementation in an RPG in years when Divinity came out. I love being able to jump in and out as I usually do not have the long play times any more as life progresses. Very useful for my play style.

Thank you!

It's not just your playstyle; these things are vital for the hack-n-slash RPG genre. Not being able to exit the dungeon at will to heal up, resupply, and sell stuff would make for a much more trying game.

Yep . . . =)

Absolutely Agree. I am playing TOEE right now with the CO8 Mod for the first time and the addition of the extraplaner chests make it possible to go longer without humping back to town to sell loot.

Open your inventory window, left click and hold on the stone, drag it to your inventory window and drop it . . . that should do it . . . =)
Edit: At the top of your inventory there is a row of icons, click the chest on the far right, the stone(s) should be in that section all the time when you have them in your inventory. You can drop it in any section and it will go to this section.