Wow...twoodcc, what a helpful response. 🙄
Question 1: Here's one way to do it...there may be others. Rename all of the folders to add a single space at the beginning. In other words, "Papers" becomes " Papers" for all folders. Finder will then display all of the folders first, then documents. I realize that this a manual, labor intensive method, but you should only have to do this in a few places, and just remember to do it every time you create a new folder.
Question 2: I am not aware of a way to directly view file size in the bottom of the Finder window...somebody here probably knows it though. The only advice I can offer here is to use List view, which displays file sizes for each file in the folder, or use Column view, which will only display the size of the currently highlighted file in the rightmost pane.