Well to start off with the disc has only the base game on it. All dlc are digital download only. When the pack was new it would have has a sheet of codes to obtain the dlc.
HOWEVER... all these codes have long since expired and are useless. The only way to get everything now is to buy it off your console's store.
If you want that dlc you need to get a refund from whoever you bought the disc off and go onto your console's store.
As for the Trial version... are you downloading from the disc and playing the game with the disc in.
If so you need to inspect the disc fir damage/dirt and check your console's disc drive.
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Are you a mod