Can i get him back?

If the child has been adopted you have no rights to it.

If not explicitly stated in the lease, is the property manager still authorized to receive service of process for the landlord?

If the owner is a company or corporation their information is likely stored online. Find the authority on your states secretary of state website...

If I'm due to inherit a house that has outstanding property taxes on it, when do I pay the taxes: before or after I get the deed

Yes you accept the property with all rights and obligations established by the predecessor in interest.

The bylaws of your hoa likely detail their powers and your obligations. Review a copy when time allows.

How can I fight this ticket

Hire counsel or appear and make arguments using handicap permit your primary exhibit.

Continuances are at the courts discretion. An attorney eh is always a good idea.

Can I seal the records from a civil lawsuit?

Filing a motion is your only hope. Court has some discretion.

Can an employer discriminate against you for a disability like a TBI injury that affects your ability to reason, remember,

I'm not familiar with the disorder you mention but research it to confirm it is a recognized ada disability.

Can I cancel this contract.

Unless the contracts provides for termination before delivery you are likely stuck.

Can I cancel this contract?

I suspect not. Cold feet and buyers remorse are not sufficient reasons to breach an agreement.