This version of Mac OS X is for PowerPC ONLY. X86 emulators like VirtualBox, VMWare or Virtual PC will not work. Use real PowerPC Mac hardware, PearPC or QEMU ...
Apple still hosts Mac OS X and macOS installers for download, free of charge, directly from their website (10.7 to 10.12) or from the App Store (10.13 to 14.0) ...