I would say that you already have bind installed since you could find the /var/named/ directory.
This is where bind store the database.
Bind has to be started and to make that when you boot to your usual run level you can probably
run the command ntsysv. This command shows you what is loaded in the current run-level.
Locate the named and press <space> to mark it if it isn't already, then <tab> to ok an press <space>.
This should start named at boot. To check if it's running try this ps aux|grep named
Depending on the distribution and version there might be some gui like configuration tools for you,
I have been using Red Hat 7.1 and it has got a tool for it in the "start"-menu.