Hey everyone. I just thought I would post here because it took me forever to figure this out. If you want to have all your clips start with a 0 for the timecode start with a new project without any clips in it. click on the gear in the bottom right corner. go to general options. click use timecode from source clip frame count. click save. THEN import your files into davinci resolve. the time code will only be 0 for clips imported AFTER you click this option.