I guess Gorgonops and 68kmla are the right address for resurrecting your PB150.
Are you ready to buy an Apple CD ROM drive to connect to your PB via the HDI-30 SCSI port?
Here is one for sale: https://www.ebay.com/itm/Vintage-Apple- ... :rk:1:pf:0
And this: https://www.ebay.com/itm/SCSI-HDI30-mal ... :rk:1:pf:0
With those two items, your PB should boot e.g. from a retail System 7.5 CD-ROM.
Initialising and formatting your Toshiba HDD may still be troublesome.
You might also consider replacing the Apple Superdrive, there are some new for sale:https://www.ebay.com/itm/NEW-Apple-3-5- ... :rk:1:pf:0
The device looks right to me, but you should make sure by checking the part number of your defunct drive.
Other than that, I would look for a helper Mac.
Much depends on what kind of other computers you can access, which may serve as helper Mac.
I would copy over a 7.5 or 7.6 System onto your Toshiba HDD install it in the PB and hope for the best.
A bootable system is hosted here: http://macintoshgarden.org/apps/macos-753-emulators
Next you want a machine that is capable of formatting your IDE drive as HFS and is able to write the files from the image above to hdd.
The obvious helper would be a Mac with free IDE slot.
As written above, Basilisk II Build 142 and Windows XP should do the trick.
A virtual machine running Leopard Server and a USB-2-IDE adapter should do too.
Leopard Server is here: http://macintoshgarden.org/apps/mac-os-x-server-105
OSX 10.6 to macOS 10.14 do run 10.5 Server fine with the help of VMWare Fusion.
Hope that helps!