Need some help with moldy seats

I recently pulled a 26 Year old Toyota Yaris out of the bushes to use it as a daily and shitbox kind of car. It has been sitting for 2 to 3 years but fired right off and everything works :). The only thing is the interior. To be honest it could be much worse… still it unfortunately has turned into an ecosystem which apparently allowed mold to grow on the headrest and seats (as seen in the pictures).

I was wondering if anyone knows how to get that out and how to generally clean the interior since im more familiar with what happens in the enginebay. Also wondering if I should be wearing some protective gear when cleaning i dont know if mold is a biohazard.

Appreciating any advice I can get since I dont know anything about interior cleaning :).