how to move an object (noob)

i have a topdown game and i want to move an enemy along the x axis. how can i achive this?

As you delve deeper into Unity, you will find that there are multiple solutions. I favor using forces, which require that you add a Rigidbody component to your GameObject inside of the editor.

Then, in your script, you would add this:

var thrust : float = 100.0;

void FixedUpdate() { //Use FixedUpdate for Physics changes
    rigidbody.AddRelativeForce(Vector3.Right * thrust * Time.deltaTime);
}

If you'd like a more detailed tutorial on forces and movement, you can visit a tutorial I wrote here:

http://wiki.certainlogicstudios.com/

The answer to this question as well as some more on scripting basics can be found in the basic scripting tutorial

http://docwiki.unity3d.com/uploads/Main/Scripting%20Tutorial.pdf