On the golok I agree with Henk that the handle probably is a replacement (based on its fit to the blade).
This makara variation is usually found on golok from West Java and sometimes also swords that has been collected around Palembang, Sumatra (which is nearby and where other kinds of W Java blades also has been found).
What's unusual is that your handle is made from wood and not horn as usual.
The scabbard is probably white brass.
And the metal of the blade I couldn't figure out when I inspected it at the same auction house as you got it from.
Michael