4: What do these mean: etc/SERVICE, src/config.h, lisp/default.el?
These are files that come with Emacs. The Emacs distribution is divided
into subdirectories; the important ones are "etc", "lisp", and "src".
If you use Emacs, but don't know where it is kept on your system, start
Emacs, then type "C-h v data-directory RET". The directory name
displayed by this will be the full pathname of the installed "etc"
directory.
The location of your Info directory (i.e., where on-line documentation is
stored) is kept in the variable Info-default-directory-list. Use "C-h v
Info-default-directory-list RET" to see the contents of this variable,
which will be a list of directory names. The last directory in that list
is probably where most Info files are stored. By default, Info
documentation is placed in /usr/local/info.
Some of these files are available individually via FTP or e-mail; see
question 20. All are available in the source distribution.
WARNING: Your system administrator may have removed the src directory and
many files from the etc directory.