Not nearly enough information. Public or private? What particularly don't you like about it?

Can I press charges against my school/principle for child endangerment and defamation?

Schools are generally immune to such lawsuits. Asking to bring in your own weapon must sound wrong even to you.

My university instituted a policy that makes it impossible for me to graduate on time. This was not the case before. Can I sue?

Anything is enough to threaten with. To succeed? Doubtful

How can I sue my local township for constitutional rights violations?

By the time the case reaches court several halloween's will have passed

Doesn't matter. HIPAA violation gives no right to sue. Sounds like your custody gives him same rights as you.

Can I be disciplined for missing work on Saturdays to take college classes (not work related)?

You can including being fired for cause. Your personal schedule is not their problem.

My son has no assets & is a student should he enter into a payment plan he can't afford?

No one is going to say hes off the hook. Bankruptcy or a payment plan

Can I use fill for change of custody on the grounds that my kids father neglects them, resulting in unhealthy habits ?

You would need an expert to testify as to the damage. After all, he can produce grade records and point to the kids' happiness.

What options does a 16 1/2 y/o have in seeing a parent that he is prevented from seeing due to a restraining order.

Speaking with CPS about his desires would be a good place to start. Being found "not guilty" beyond a reasonable doubt does not mean CPS does not...

CP denying ordered visitation on a regular basis and telling children NCP should be feared and is a criminal. Is this abuse?

First step is to hire a lawyer, second step is to let him do his work. Custodial interference and getting kids to lie is a difficult thing, and...