depend on your job / role but be honest give the actual image to your subordinate to identify his/her room for development.
1. What you see their best qualities such as commitment dedication integrity and how he/she contributed to achieve your given KPIs
2. Any issues faced due to his / her activities which affected KPIs like not good in excel or any relevant software, do not concern on team objective etc..
3. Depend on the job again (if she / he weak in excel add it as an objective which helps to achieve KPIs as well as career development)
4. Again depends (for marketers communication skills, Programmer typing speed likewise)
5. Areas of improvements like how much contribution required from the sub. what is expected etc..
6. His / her feedback on your review
can't answer this is depend on your job / team role