You don't specifically get play points from AC, I think it's all ubisoft games. To earn the points you have to gain certain achievements or do certain things in the game, depending on what it is it will give you a varied amount of points.
unlock certain achievements
Theres an app for that. If not, go to Ubisoft on the computer.
To my knowledge, none in English. But at some points they do say it in Italian.
yes
You have to make a Uplay account and gain 250 points (you get points by completing sequences and ranking up in multiplayer). Then you purchase it for around 250 points. It is then available in the homestead.
Nothing. Not like the first one, no achievements.
The Harlequinn was available for free through if you preordered the game. Now its 48 Ubisoft points. Ubisoft points are received from playing the game.
to get uplay points complete actions displayed in the uplay menu like achievements or trophy's
Sequences 12 and 13 are downloadable content that cost Microsoft points on the XBox360.
I'm pretty sure it can be purchased for 300-400 Microsoft Points from the Online Store.
yes if jou see some kind of triangel with 4 points it means the game saves
you need to go up on all the view points and then eventully you will find a mission.