Once you create the pcb for the particular schematic means, then it is possible to extract net name and pin numbers. By using Report writer can get these details.
I don't know about automatic creation of table of content.
I hope that this one will help you.
You cannot generate a TOC directly from DxDesigner, see Idea POST data on the Ideas site and vote for this enhancement request. You also cannot create a Xilinx XDC file from DxDesigner you would need Mentor Graphics' I/O Designer to add such support.