You need a PlayStation emulator and it's obvious you can find it here (it's not called Emulator Zone for nothing).
If you need an emulator that doesn't require further configuration, try
pSX. If you want quality (better graphics and sound), try
ePSXe, but it requires configuration and it's a bit troublesome. I recommend you to read this
guide. You must also know that these emulators require a BIOS file in order to work, but since it's copyrighted, we cannot tell you the exact location of this file (use Google and I'm sure you'll find it).
If you have the "Legend of Legaia" CD-ROM, you can use it. You can use the CD-ROM image too (downloadable in most cases). Games are copyrighted too, that means we can't tell you where to get them.
Welcome to the forums and happy new year.