Why do you think the bank has to do anything? You signed a document filed with the court called "Statement of Intention" in which you said you were surrendering the motorcycle. You have to go to the bank and give them the keys and tell them where the vehicle is. They may direct you to take it to a specific location to surrender it.
If they want to abandon the property, they have to do it in writing.
Your claim is most likely covered by a WC insurance, either a prvate policy the employer had or one with the State. As such, your claim should be unaffected by the Bankruptcy.
File a proof of claim
A judge or court may sometimes expunge a claim in bankruptcy court. This means that the claim is erased, as if it never happened.
No limit
Not as a rule. If the claim was something that arose after the filing, it will depend on the nature of the claim. If the claim arose prior to filing, you must have disclosed the claim in the bankruptcy documents and the trustee may take over the claim. Consult a lawyer knowledgeable in bankruptcy.
I have been through Chapter 7 twice and both times was unable to claim my Student Loan.
Yes. That is probably one of the times this would be the correct Chapter to use.
By filing a proof of Claim, or by addressing questions/arguments to the court
If it is not a secured debt it will be included in the bankruptcy discharge.
In a chapter 7, with a no-asset notice, no claim can be filed. In a chapter 13, all creditors should file a proof of claim within the time period provided.
No
You don't need any forms - child support is not discharged in bankruptcy.