Son has started taking lessons and is taking to it well. Looking at...
Tour Edge - Bazooka HT Max 2x6 Hybrid Irons Graph/Steel
Adams 1212 - Tight Lies #5, 6-PW/SW Hybrid Irons
Thoughts on each?
At 17, is your son at any point Financially responsible? IE, can you give him a pile of money or incentive to get certain grades and you will match funds for him to purchase his own set? Chances are if he appreciates the game, he will appreciate and take better care of something that he at least has some investment in.
On top of that, most people find buying golf clubs almost as much fun as playing golf. If your son is into that portion of it, he might prefer if you helped him purchase a set, but ultimately let him make the decision.
When I was 17, I was a total computer nerd. I really wanted to build a new computer, so my parents proposed to chip in a small amount of money for every A I got on the following report card, and slightly less for every B. I combined that with money I got for working my summer job and at the end of that summer was able to purchase the computer that was exactly what I wanted. It is a life lesson for the value of money as much as it was an incentive to work hard in School.
Places like Ebay, craigslist, here and the "other" website are all great places to get gently used equipment that anybody including your son would be very proud to own.
Since you were not asking and you are the parent, I shouldn't but into your style of parenting: Here is a list of clubs that I think are a great place to start on a budget
for the driver, I would suggest something 3-4 years old with a 460 deg head.
Taylor Made Burner is always a popular choice, Ping G10 another worthy contender
add a cheap wedge, a putter, and a bag and you are well on your way.
Doubt he would need Hybrid irons. At 17 he is probably strong enough to swing standard clubs. My son is 18 now, I picked up a set of old titleist DCI oversize 3-PW on ebay for $100 and he loves them.
I agree with the Taylormade driver. Maybe a burner or RBZ. They are good clubs for the wilder swings.