Witcher 3: Wild Hunt Complete Edition - PlayStation 4 Complete Edition

Is the DLC included on the disc or just as a download code? i'm mostly concerned with the DLC missions/quests.

Ive never played any of the other games in this series... will i be totally lost? Should i still play this? Any advice?

Is the DLC on disc or is there a code you use to download it?

Is the blood and wine Dlc included?