That is a big question.
I get the feeling you need tutorials so let's find some.
1. DLNA appears to be "on" in the set. No change in settings that I can see from the manual.
2. DLNA servers for the PC? See the list at http://en.wikipedia.org/wiki/List_of_UPnP_AV_media_servers_and_clients
I have NO PREFERENCE to any title.