I've never played the game and I'm not familiar with Warhammer lore so I have a few questions

1) How many factions can you play without any DLC and which those are?
2) What DLC's are good? They are quite pricey, especially those that add new factions.
3) Does Grand Campaign work the same as it did in previous TW games? Conquer X amount of settlement to win?
4) Some factions apparently have their own unique mini campaigns? How do those work?