The trade points for II are on the member website for the 1 and 2 Br units. The studio and 3 BR are proportionally more or less depending on the one in question. To my knowledge, there is no listing of BVTC points other than through DVC.
Not through DVC or directly through II. You can only trade for the 350 or so resorts that have been blessed by DVC. Of course you could trade privately or through an independent exchange company and have access to all II AND RCI resorts potentially.