During installation of mybb 1616 , there is one step where we have to insert database server hostname.
what is that??
most probably it is localhost. if it is a different one then you have to find it from web host panel.
btw, if you are installing MyBB 1.6.16 then it will not consist of earlier forum content.
it will be a fresh forum with yourself as a single user.
is it possible to import user list through phpmyadmin???
^ your recent earlier threads have required details and you might need a generous person to help / guide