/Agree with above posts.
When it comes to endurance training, people never focus on their intake and nutrition/diet. That should always come first, as they will have to be especially careful to consume exactly what their body needs.
When it comes to running, as with any training it will have to be progressive. If they have never run before, they will have to train longer (not running, but months in advance). Endurance training- like other forms of exercise always has as much to do with its mentality and the persons knowledge of their own body and how they can pace themselves.
Build a plan off a generic running plan and modify it as they go along it.
For myself, I dedicate 3 days to distance, 1 day to speed/explosive training and 1 day to heavy lifting+short recovery run. The last 2 days in the week will be recovery.