Hello,
In order to be eligible for the office of president you will need 2 things.
1: You need to be a natural born citizen and/or a citizen of the United states.
2: Need to be eligible to the office of President; age 35+ and a resident within the United states 14+ years
3: A reason to run ( I mean duh, Your going to need a plan. Have followers in your vision and supporters)
The length of turn is up to how long/much there elected. Max is 8, Min is 2
Hope this Helps, Have a great day!