Here are my honest thoughts on your business....
I am VERY glad to see young men like yourselves with the entrepreneurial spirit. That's encouraging and I like to see young people who are big thinkers and willing to work! Awesome, I'm sure your parents are proud of both of you.
Take this from a 31 year old guy who started a real estate company when i was about 19 years old. You are NOT going to be respected by most and if people know you are under 18-20, they probably won't hire you. I actually think having your photos on the site is a good thing. This is at least full disclosure. I think most everyone would be surprised when they met you and to be honest, many people might treat you badly and some might even turn you away. I know this is not fair. But the business world isn't fair. I also understand that you might have more knowledge and skills than alot of 30-40 year old folks in business but it doesn't matter. You have a long row to hoe when dealing with the general public in a professional service when you are sub-18-20.
What I would suggest is to market yourselves to friends, family, neighbors etc. They know you, they know how old you are and they probably trust you enough to put their pc repairs in their hands. Then if they refer you to other customers, that's great. They will certainly tell their friends, "Hey I've got this neighbor kid who fixed my computer and did a great job. He's only 16 but he started a business and is a very nice young man and very honest." That's great, now the potential customer knows what they are getting into.
Again, I know this seems unfair and you want to prove the world wrong. I'm also not saying this CAN'T work, I'm just saying that it might lead to alot of uncomfortable situations and some unhappy people when they find out your age. I might just try to keep this business small, be up front and honest about your age and market yourselves to your friends, family, neighbors and parents friends.
Just my 2 cents. Good luck and I wish ya'll the best!