To get the pages of this site indexed in the major search engines, you need two things: content and inbound links (the latter being the more important).
Content can be as simple as product name, type & description. Your first step here should be Keyword Research in each product category - and even for each product. You need to know HOW people are searching for these items so that you can decide which terms you want your pages to rank for...
It's a great site, by the way! This page is a good example:
http://www.shopping-the-internet.com/RoncoST4000.html - the content is perfect. Descriptive, etc. The only thing I would suggest is another "call to action" or order button at the end of the page (once they've read it and decided to purchase - dont make them scroll back to the top. Make it easy!
).
On that page, if you decided to optimize it for "Ronco ST4000", then you would need to use that in the Title Bar on that page, as well as in the Text Header (font size H1 or H2). You would also want to gain Inbound Links to that page (from other pages on other sites) using the link text "Ronco ST4000".
Of course, there are only around 2 searches a day for that particular term... which is why it pays to start with your keyword research