Do we need to pay to get in the museum?

Feb 3 is free museum day. Check with crocker one Sunday per month free too

Yes, $10 adults, $5 youth(7-17), 6&under are free but 3rd Sundays are free

Yes, there is a senior discount. There may be other discounts too and sometimes there's a free admission day.

Yes.

Yes 15

Generally yes, but there are some pay what you want days, and some discounts for demographic groups