It includes a full, complete culture, both plains/forests and deserts villages, all vanilla buildings plus a new town hall, all regular NPCs with new textures, all NPC shops plus the new town hall shop, and quests!
The quests are designed as a tutorial to Minecraft, introducing you to each and every item in the game, how to obtain or craft it, all monsters, all animals and plants, and all world gen structures. There is also one secret quest for obtaining Bottles o' Enchanting.
Minecraft's vanilla culture is a peaceful people and won't go on raids, but they will, of course, defend themselves.
This culture comes ready for use in ExtrabiomesXL and now in version 2, Biomes O' Plenty!
Go download from the Millenaire library! http://millenaire.org/library/view.php?cid=150
And a pretty easy installation:
1. Extract the 2 zip files from the Millenaire_vanillaAddOnFor152_v2.zip file
2. Extract the contents of the zip file Millenaire_vanillaAddOnFiles.zip to your .minecraft/mods/millenaire-custom/mods folder
3. Extract the contents of the zip file Millenaire_vanillaAddOnGraphics.zip to your .minecraft folder
3a. Or extract the contents of the zip file Millenaire_vanillaAddOnGraphics.zip and place them in your millenaire5.x.x.zip file
3b. Or keep it as a zip file and let a custom launcher extract and load it for you.
4. You may need to change some options in the config: generate_colour_chart to true and generate_goods_list to true.
5. Run Minecraft and enjoy!

A full, starting village

The new town hall

And just a picture of a villager building a house