There are two ways to add images to your posts / blogs:

Method 1 - An image on another website
The easiest way to add an image to your submissions is to create a photobucket / FlickR etc account. Once created you can then upload your images to the account and then link to them from your TRC post.

To do this get the URL for the image, so lets say that the URL is:
You would enter the following into your TRC post:

Click submit and that is it. You will end up with this

Method 2 - An Attachment
The second way is to upload the image to TRC, to do this have a look at this FAQ entry:

Community @ The Rev Counter - FAQ

If the image you add it fairly large it will be displayed in a smaller size, member can then click the image title bar to view it in full size.