It is important to arrive at an understanding with the photographer/video person as to the number of pictures or film you want them to take as well as how many pictures you would be required to pay for before the Bar-Mitzvah date approaches. It is a good idea to check with the photographer to see if he will provide a copy of the negatives or a CD of the pictures for future use.
There are many options available for music at a Bar-Mitzvah celebration, ranging from a full band to a DJ and recorded music. Take the time to look around for what satisfies your taste and budget.