Your friend was dead right, whenever Interviewer ask about yourself tell him about your profession.
Some things you must tell him/her,
Education Qualification(schooling , collages, university ,Degree etc)
You can tell these things too, But these are not compulsory.
Your Hobbies ,
Hobby is a part of your living, Although it might be tempting to share a list of your most compelling qualifications for the job at hand, a more low-key approach will probably help you to develop a personal rapport with your interviewer. Examples might include a hobby which you are passionate about like quilting, astronomy, chess, choral singing, golf, skiing, tennis or antiquing.
Interests like long distance running or yoga which help to represent your healthy, energetic side are worth mentioning. Pursuits like being an avid reader or solving crossword puzzles or brain teasers will help to showcase your intellectual leaning. Interests like golf, tennis and gourmet food might have some value if you would be entertaining clients in your new job.
Just tell them how many members are in your family and that's it.No more
If interviewer ask about it then you should tell them.
Any person you know working presently in that company
Your Address(Not detail one)