Study of those pages will help you design your own media from what you have available. Also examine page b030.htm to learn the composition of simple media which support many common genera of bacteria. Nutrient agar is the most widely used medium in highschools, but not in my laboratory. TGY supports the growth of many more species. Nutrient Agar is specified in many texts because it has been used since the 1880's when nothing better was available.
Nutrient agar is a very low quality medium.
Nutrient Broth is Nutrient Agar without the agar. In my laboratory, I use NB only when I have a special reason not to use a tryptone broth. It is not necessary to autoclave this unless you are making stock cultures. Adding a chip of limestone or marble to each tube will neutralize the sulfuric acid produced by the bacteria as they oxidize the sulfur. My Thiobacillus survived a year on this medium at room temperature.