Font documentation?

[Fairchild]

I've been fooling with fonts and getting flusterated.

Is there documentation that will answer such questions as:

 - What is the default font?
 - What is unique to the default font?
 - What font sets are conveniently available?
 - How to reach other font sets that are provided with download?
 - Which are scaleable?
 - What are the font set file naming conventions?
 - What file types (extensions) can be used: .cm, .mf, .tex, . . .  ?
 - How many characters are in each font set: 128, 256, . . .  ?
 - How to peek at the font sets?
 - What are the characters for <blank> and <line feed>?
 - Etc., etc.

Using 2.4.3 under Cygwin, Windows XP.  

I'm not asking for detailed answers to these specific questions, though they would be helpful, but for pointers to documentation.

Thanks.

                                       - Bruce