Welcome to the forum! Tz75's are fine handguns. My understanding is that they were the ancestors to the small frame model witnesses so if I'm not mistaken they should take cz75 magazines. I'm not the expert in these though, so take that for what it's worth. I'm sure someone more knowledgable on tzs can help.
You should be able to email EAA, European and american arms corp and they can tell you a lot about your gun if you provide them with your serial number. Eaacorp@eaacorp.com
Oh and yeah, pics are a must.
Darin