What should I include in the portfolio apart from Home, About, Work, Contact?
That is not a portafolio. That is the CV. Be carefull on publishing adresses on a web page if it is not a business adress.
I have never worked on any real life examples so what to display in the work/portfolio page?
Display what you have done, you can not show what you have not done... I know, lame answer, but a profund one.
What kind of design samples do I need to include? Ex: Website, Logo, Banner etc.
Ok I am going more serious this time. Take a look at this question: Whose persona should I consider while designing my portfolio?
You are a seller of your work.
I personally do not give a hoot :o) if a great image, logo, web template is not used by a real business. If it is good it is good. So my answer is: prepare a good work.
Take a look at this few seconds of this video: https://youtu.be/H7eWZFgo2xI?t=2m22s