No need to worry. Just tell him a summary of your curriculum vitae. But make sure that you don't tell him your life history. Be brief and be honest. Its better to be honest than to catch lying later.
One of the questions that are asked in the interview is " why do you want to work for us" and " can we afford to pay you"
It seems every one is feared of interviews. It is just a test to know how you can face others without any fear and raise your opinions whenever needed. They will not just test your intelactual ability rather, they will try to know how you can make all the aspects that you have studied into practical life. The things that you do should be usefull for others also.
Other qualities are: good personality, leadership quality, problem solving ability, creativity, hardworking, good behavior towards your customers etc. . . .
Hope it is useful.