Text only? I'm missing something — sorry.

My posts consist of nothing but a post title and an image. I was hoping the theme would show the image, but it’s only displaying the title. If I click the “continue reading” link the image is displayed in the resulting post page.

So two questions:

– how do I, or can I, get the images to show up in the preview?
– how do I eliminate the “continue reading” link?

Thanks.