If the machine has a slot drive cdrom you can use a car key in the most extreme right hand internal portion of the slot. This will cause the computer to eject the drive.
To boot from any OS disk on a Mac you may need to press and hold the "c" key down if the computer does not automatically select the cd rom as the boot disk.
If you are looking for a Macintosh operating cd rom, check out ebay. For a Mac that old look for OS 8.6 (you might have to buy version 8.1 with an upgrade to 8.6). If you have at least 64 megs of ram, you can install OS 9.22. I wouldn't try using OS 10 on the system unless you have at least 128 megs of ram AND have made sure the firmware systems are all installed, which you have to use OS 9 to do.
To boot from any OS disk on a Mac you may need to press and hold the "c" key down if the computer does not automatically select the cd rom as the boot disk.
If you are looking for a Macintosh operating cd rom, check out ebay. For a Mac that old look for OS 8.6 (you might have to buy version 8.1 with an upgrade to 8.6). If you have at least 64 megs of ram, you can install OS 9.22. I wouldn't try using OS 10 on the system unless you have at least 128 megs of ram AND have made sure the firmware systems are all installed, which you have to use OS 9 to do.