I cant answer all of your question, just because I dont know. But will try and answer the ones I do know.
Probally not, atleast there isnt word of it. Also all servers will have a slightly different story and technological advancements.
To have land immediately at launch yes, as you will be able to buy it with expo point in exposition. But you will be able to purchase land using ingame currency from the count table without a bloodline package.
4.Merchandise Tokens? As I dont know what you mean, please clarify this one.
Mechanically there is. Your childs cant be killed till the come of age. You can also lock their NPC codes so only you or trusted people can spark into these upon your own demise, given that you accumulated enough story points.
Their isnt much known or shown recently. But in the past there where some shinies and DJ on it. At this moment I have to say it would be skill based. Both on the player skill as character.
A kingdom is about as big as a state so it will take you awhile. (think the comparison was a state) Anyway most duchies will already take several hours by foot.
The will not be locked. You can achieve a mayor position or even king with enough work (and support). Currently none of these position are purchaseable and wont be when the game is live. The last confirmed time you can get a title is in the Settlers of Elyria event. which is a reversed auction.
Well seems that the coding system is off it scrambles my numbers :(