You can start with education background, down to your university, talk abt your family - how many siblings etc and maybe your ambition. The question of "Introduce youself" is the time when interviewer wish to get to know you better. I have mentioned this b4, bt I'll say it again - there r ppl who advise you not to repeat what's stated in your resume. But I would say, why not? The person who interviews you might not be the person who calls you up. Your interviewer might be a dept head who's too busy with his work to read your resume beforehand. A number of them only read the applicant's resume for the 1st time during the interview, while some who'd read it before might not remember due to the fact that you're not the only applicant.