HTML can be found on any web page. All the popular browsers have a View Source option, so if you find a page which does something you want to do, view the HTML source and see if you can work out how it was done. Because browsers vary in several ways, you cannot assume that your page will show up as you intended in other peoples' browsers just because it displays correctly in your own browser. Check the Monash Web Servers page for information about getting your work published at Monash. Dan Tobias explains what HTML is meant to be.
Style sheets are the best solution.
HTML Index of web pages about HTML and related topics. Beginners may want to check out the Guides and Tutorials section.