If I buy a GOTY edition game used do I still get the free dlcs and other magic stuff??
Er, community discussion is for non-game related threads, I have no clue if you're talking about Morrowind, Oblivion, Fallout 3, or Fallout NV.
I don't know if the free DLC for Morrowind are still available, but they were never included on the GOTY disks. I'm also not sure what the DLC status is with the Oblivion GOTY edition. Fallout 3 and Fallout NV should come with all of the released DLC, although none of those were free.
I'm not sure what "magic stuff" refers to.