The teleport is located under the miscellaneous tab on your teleportation dashboard! Quick Tip: Click the Runecrafting skill on your skill tab to open up the direct teleport!
To start training Runecrafting, you'll ofcourse need the Rune Essence first. Below are a few options on gathering them. Run north after teleporting to Runecrafting and start mining them yourself. 150x noted essence on Theatre of BloodCommon drop table 150x noted essence on global slayer drops (1:300) 250 noted essence from Bomberman (1:30) 250 noted essence from Platinum Guardian (1:150) 500/1000/1500 noted essence from The Nightmare