Resourcefulness is more of a mindset. New parent? OK, what have you discovered about childrearing that you didn't anticipate? What will you do differently next time? What is your ideal work/life balance? These are all relevant things, and sometimes the young parent is a superb hire and may read very interesting books in anticipation of having more time to hack in a couple of years.
These are extremely inappropriate questions for a job interview.
I like the attributes you're probing but I'd keep it within the context of engineering and programming if that's what you're hiring for. That's part of the reason open source and github projects are such strong signals in hiring.
There is essentially no way to you can ask or solicit for information about their family status. Don't even go there.
For a less trivial example, take "resourcefulness". To a large extent, resourcefulness is determined by access to resources. Continued learning after college takes more than curiosity: it takes a bunch of free time to burn on reading, hacking, debugging, etc. What if the interviewee has been spending their time outside of work raising a family instead?