I am looking for a script that, when you walk into a portal, you will be teleported to the next level and see a message that says level 2. Thanks!
If you have done the FPS Demo Tutorial here at unity than there are all kinds of example scripts with those things in it and more 
Just gathering those tutorials together give you lots of learning material. and it also tells you in the doc’s :idea:
Help Scripting manual Under runtime classes in the application section.
Then to display a message can be done several ways, (ie)guitexture,gui text,labels,3d text,ect.