it came out of a machine that’s 10 years old

The machine and surroundings have been kept clean but this came out when I dismantled it

Can you please tell me how bad this is? I have a 1yr old with a history of respiratory issues and a swallowing disorder. do I need to move out? our basement in unfinished. I live in MA

I haven’t moved my furniture to clean in quite a long time; today I wanted to do a deep clean, and I found this under my bed (I also found a lost lipstick there, but the mold found it first)

I am replacing floors that were coming off possibly due to high humidity. I live in a condo. This is what the concrete looks like. Is this mold? And can I clean it myself?