If you don't have wheels a used pair of alloy wheels would be best. If you can't find those then you can get some of these : http://www.velomine.com/index.php?main_page=index&cPath=87_172_176&zenid=ve8ckr14eoiaeoqm4lpdcv8ga2

The bottom bracket, stem and headset are likely French sized. If you don't have wheels then don't worry about the freewheel threading until you have the wheels. It is not a fancy bike and instead of spending a bunch of money building it up you could buy a nicer fixer upper frame complete with parts for less than you would spend on this.