You should use any Installdisk v2.7 or v3 or so, depending what language you find on that disks.
Once you have a working system the rest is really try and see, as all those disks and the backup files are 'copies'.
There is however a little step involved in understanding and therefore use of the system as it is not an Amiga in the most common sense.
If you have the system installed with the main software it is pretty much self explanatory, i mean for a NLVE system from the 90s.
There is probably a manual somewhere outthere, i don't have the time to scan or locate it just for now.
If your machine is working basically, feel free to experiment with it and make backups along the way.
And, just to save yourself some trouble: No, you cannot turn it into an Amiga for all we know up today just yet.
You can read on the technical details here:
http://eab.abime.net/showthread.php?t=75161