Business to business suppler responsibility. Who retains liability?

I'm assuming you never took possession of the tool. If not check your contract in hopes it controls and requires safe delivery to your door.

Red Light Camera Ticket

Unconstitutional in Missouri currently. Speak with an attorney in your area.

Do I sign the agreement or am I getting a bad deal?

Sounds like they are proposing a settlement of your dispute. You may either decline or remain without.

The practice of law is difficult and various cautions must be observed in responding to people you don't represent. There are nightmare stories of...

How can I get a settlement on back taxes owed?

A settlement can be arrived by negotiating a compromise of the amounts due and owing.

How do I ensure that I can still get visitation with my son if I let my dad adopt him?

You can't. An adoption is a termination of parental rights.

Is there a way I can start law suit against them ?

The matter will only resolve in litigation unless you can negotiate a settlement of the bill.

Is this a legit contract for deed since nothing is filed at the court house?

Hire counsel to draft legitimate documents. Most of these deals are shady and poorly drafted

After I sign a business contract, do I have a reasonable chance to win a dispute with the contract based on duress?

Sounds like hard bargaining to me. You always have the option to decline.

Is this legal? Is a third party inspection required? What are my friends options?

The lease agreement will control. Read it and your answer will appear.