Getting a render in Maya is quite straightforward. I'll give you the steps to do it with default lighting:
(1) Frame your model nicely in your viewport.
(2) Switch to the Rendering menu set by pressing F5
(3) Select the following menu path: Render->Render Current Frame...
A window (Render View) will pop-up and, shortly afterwards, your image will be rendered.
You can then save your image directly from the Render View by clicking File -> Save Image...
Edit: I strongly recommend doing a search in the Maya documentation for "Render View", this will give you all the useful features of this window.
Once you have the hang of this basic rendering, I suggest downloading Mike McKinley's 3 Point Lighting tutorial
which will teach you a simple lighting scheme to make your renders much nicer.
To post the images as attachments to messages on this site, you need to click the Post Reply button (see below), this will take you to a more detailed posting page.
The post reply button looks like this:
That'll do donkey... that'll do...