Congratulations, you have managed to disable a key part of the system. libc is needed by pretty much every program on the system.
You have to boot to the rescue system, then manually install the package glibc. This involves use of the command line. If you don’t feel up to it, and you didn’t get very far customising your system, perhaps you should just reinstall openSUSE.
However booting from the CD should not be affected. That is a BIOS issue, as openSUSE isn’t even loaded yet.