Ok so to make teleports, all you really need is a brush and an entity. So to start, go to the place you want to teleport from and make a box with the trigger texture, then select it and press CTRL + T and tie it to trigger_teleport.
Screenshot:
Now go over to where you want to teleport to and create an entity called infoteleportdestination, select it and press Alt + Enter to bring up the properties and give it a name such as "teleport1" or "end".
Screenshot:
Now go back to the box you made, select it and press ALT + Enter to bring up properties, click on remote destination and select what ever you named your infoteleportdestination (Look at screenshot).
