i just need to configure the radio and repeater with the same settings?
That's over simplifying it.
A repeater that old needs to be tested/aligned to make sure it's working correctly. That requires the right tools/test equipment/knowledge/skill.
The repeater needs to be programmed correctly. It needs to match whatever your license permits.
The duplexer needs to be tuned. That requires the right tools/test equipment/knowledge/skill. If not done correctly, it's going to have very poor range.
If you've got all that covered, then the portable radios need to be programmed.
But it's not as simple as programming it identically to the repeater. Things will actually be reversed. The repeater transmits on one frequency, and the portable radios receive on that frequency. The repeater receives on another frequency, and the portable radios transmit on that frequency.
Repeaters are not simple things to install. We go through this frequently on this site. People will buy a used repeater and assume that it is simple to set up. They then spend another few thousand dollars trying to make it work correctly.
Just make sure you understand all this before purchasing any equipment. It's not a simple process.