To print to a networked printer, the print command is lpr -P printername , where printername is the name of the printer you wish to print to. Make sure the method with which you wish to print is selected as the default print method. You can do this by going to your desired print option and pressing return . N will allow you to change your password. Pine will ask you for your old password, then ask you to type in your new password twice.
C allows many configurable options.
These should be easy enough to figure out. The .signature file allows you to create a customized signature tag. You will get a blank screen. Type in the information you want to include and hit control-X to exit the file. From now on, your messages will end with this customized tag.