You could create it pretty easily using a text preset in AE like the Typewriter one... Not sure what you need to know beyond that...
Adding the flashing cursor is the tricky part. DigiEffects has a fairly expensive package (or was it Red Giant, no, it was PUFFIN!) that includes a marvelous typewriter-based text generator. Options include leading, trailing, and synced cursors in lines, squares or bullets of choice.
A quick search turned up nothing but illegal file sharing sites for Puffin Designs. Looks like the ancient Puffin plugins for After Effects are long gone, orphaned.
Sorry for bringing it up. but it was fun to reminisce.
See the tutorial by Rhys Enniks linked to near the bottom of this page, which shows how to do exactly this.
The techniques used by Rhys are somewhat advanced, but he does a good job of walking you by the hand through the process.
Since you're new to After Effects, I strongly recommend beginning at the beginning:
Just want to say thanks guys for replying to this thread. Great to know there are people out there that can offer a hand .
I did consult a tutorial before I set to work which was really helpfull whick in essance is pretty much what this tutorial shows:
I added a computer monitor as the background in AE and also a shape layer with a square the same colour as the text at each point where the text stops to act as a cursor (opacity for that item was turned on and off to give the impression of it flashing). A glow modifier was also added to the text and the cursor along with a deformation modifier to simulate the curvature of the screen
That turned out rather well. I'm glad that it worked out.