i wouldnt worry about the sitemap. they are basically just a big list of all the pages in your site, to help search engines find them better. if you've only got 2 pages in the whole site then there's no point.
the robots page is basically a file which tells search engines to keep out of certain directories and away from certain pages, if you dont want them to appear in their search indexes. you can also use it to keep troublesome search bots away from your entire site. but if you want both pages of your site indexed, then you can forget about it.