Most presentation courses you go on will always say it is about how you say it rather than what you say that makes a good presentation. All presentations fall into two categories: either to persuade or to inform. If they have given you a topic it is probably the latter if it is about yourself then it is the former and the aim of the presentation is to persuade them to employ you.
Assuming the latter, go to someone and ask what they would want to know to be persuaded - they will come up with two or three questions such as what would you bring to the company? and why do you want the job?
So your content is
Introduction (1 min)
State purpose - persuade you to employ me
What questions you are going to answer i.e. the ones given to you
So for instance:
What would I bring to the company? (4 mins) (if you have three questions then it is 3 mins for the most important 2 and 2 for the least)
List three or four qualities - no more and illustrate them with examples and anecdotes from your experience, there are other devices you can use but I will keep simple - this is a key bit to getting your point across, they will remember examples and ancedotes much better than just a list.
Why do I want to join the company (4mins)
Again three or four reasons and put them into a context compared to your present role and make them easy to understand.
Conclusion (1 min)
Restate aim to persuade you to employ me.
Why me? Restate qualities
Why you? Restate point.
Bring out your inner Italian when you speak, look at the triangle formed by their eyes and nose and enjoy yourself.