I'm certain you're having a freshly formatted bootable partition on that harddrive. When something bootable (floppy, hd partition, whatever) is completely empty, you'll just be given the cli with only resident ROM commands to use, as someone already pointed out.
So, as someone else already pointed out (

, you're going to need a set of workbench disks. Alternatively you could download amiga in a box (AIAB) which includes OS3.1 afaik and fix that up to work on your system... but then again, with absolutely no amiga software or other amigas transferring data to the amiga isn't going to be pleasant.
So I'll do the obvious and suggest finding a user group near you

Sincerely,
-Kenneth Straarup.