[CaptainMench] “I need to keep working timing and placement of CG elements and would like to know (there must be) a reference to rendering out wireframe models or block models?”
Render/Make Preview – you can render as the editor with that (so whatever your editor window is set to show it will render that level of detail).
[CaptainMench] “Also — another point to the manual… rendering out multiple passes… is there a way to render out specific elements into different files or channels? I need to composite each item on it’s own.”
Render Settings/Multi-Pass – add whatever channels you want, render to you favorite format.