first, if bio dad is on SSDI, you should be getting a payment from the government based on his benefits.
Second, you could file for an involuntary termination of parental rights based on his failure to accept parental responsibility along with a step parent adoption petition.
As for the move, give notice of your intent to move and then he needs to object, if he doesn't you can move. If you need him to sign for a passport, then you will need to file a motion to allow you to get one.
you have two choices. 1) file a motion to modify his placement, ask for supervised ect (which is the proper way to do it) or 2) Refuse to let her go, wait for him to file a motion for contempt and be ready to tell the court why your behavior was in your child's best interest.
Ah if the home has been sold at a sheriff's sale and the bank bought the house back, your landlord is now the bank. She no longer owns the home and anything she tries to remove will be theft. You should contact the bank to see if you need to get out of the home.
Unfortunately there is not much to be done. You can go back to court for a revision of placement/visitation to set actual days/times and at the same time ask for an order that he is required to return items; however, even if you get the order, if he doesn't comply you will then have to take him back for contempt of the court order.