Hi,
No badges in the photos are related to the ROK marines. marines have a star and anchor on their insignia. badges can be both metal or embroidered. here is a reference:
https://i.imgur.com/2yupjeN.jpg
the triangular tank badges you have on the first pic are related to the ROK army's tank training command.
The badge on the top right of the first pic is that of the National Defense Academy of Japan
For the rest, I will find some Korean contacts for further confirmation