Blank Slate?

I’m looking for a way to remove all current objects, creatures and buildings from the game. So that if I generate a world I load up in an empty (apart from the biomes) world. I’d like to do a total conversion and I’d like to use this as a starting point.

Can I do this using the .JSON files?

I don’t think I can compile… I run Windows and last time I tried to compile with CodeBlocks there were several extremely large roadblocks that no-one seemed to know how to surmount?

Currently no way.
You could overwrite the regional settings and overmap specials. This wouldn’t disable all core objects, but would prevent them from spawning.