There was a thread about this six months ago or so, and there was a huge variety of opinions on what the OP should do.
I'd split this into separate issues, personally.
The people in teenage porn, as long as it's coming from respectable places, will be over 18. They are clearly dressing and behaving younger, though, and that would bother me, especially if I had children of my own. I'd talk to him about this and point that out.
Next, it's the issue of porn in general. It doesn't sound like you're happy with him watching porn at all, regardless of the age. That is okay. Not all men do it. Probably around 50% do. People who are with men who watch loads of porn tend to say everyone does it, those with people who don't say nobody does, but there's probably an even-split. If your husband is watching it daily, he's developing quite the habit. If you're not happy with this, it's totally okay to tell him so.
Finally, what your husband expects from you. There is a link between what people watch in porn and what they expect to do sexually - look at the surge in people having anal sex after it became so popular in porn. Decent men know that porn is porn, though, and they aren't expecting hour-long BJs or five-ways or athletic positions. As with anything, it's a good idea to set your boundaries.
It does sound like you need to talk to your husband. Having a sex life will take effort if you have young children and full-time jobs, but you might find that it should be a priority. You need to tell him how his regular porn watching makes you feel, that you are very uncomfortable with his penchant for teenage porn, and that in general it's stopping you from wanting to have sex with him. Perhaps he could give up for a period (he might need to stop slowly, over a few weeks, if he's watching that frequently) and you could both focus on improving your actual sex life instead?