You should request from your partners a copy of the LLC agreement to know the terms and conditions of the operating agreement, which is the document that governs the relation between you as a member vis-a-vis the other members and the company. I would be happy to assist you with this. Feel free to contact me to make an appointment to speak.
Generally you prepare K-1 statements for partners in an LLC. With no partners, no K-1s. Tax software such as Turbotax should be able to help you or can discuss with your accountant. Legally now, you need a single member operating agreement, which is a pretty standard agreement (but important to help protect the LLC's limited liability status) that any business attorney should be able to help you with fairly easily.
You sound a bit paranoid. If someone used your social security number for an unlawful purpose and makes false representations to the IRS, they are most likely breaking all sorts of laws, including criminal. Then again, you are not paranoid if someone is really watching you. I am not sure, but perhaps you could send the IRS a Freedom of Information Act request to determine if anyone has unlawfully used your social security number to obtain an EIN.
What kind of business? And what kind of monies? Certainly you should declare all taxable income to the IRS. Perhaps certain exceptions apply (e.g. maybe you do not need to declare a "gift"), but you should discuss this with a qualified tax attorney or tax advisor (which I am not).
No written rental agreement? All agreements with respect to real estate need to be in writing in New York. Who is the owner of the space? You may be able to wiggle out of this depending on the facts and how your partners and the landlord react. Assuming the potential liability is anything but negligible, you should get an attorney. And the next time you start a business with fellow shareholders, hire an attorney to draft a shareholders agreement for you. Do not be penny wise and pound foolish.
You should discuss this with your new lawyer and if he/she is any good, they will be able to help you. It is the client's right to choose who represents them. You should also be able to get back unused portions of your retainer.
Your shares in your corporation are personal property. Without bankruptcy protection, those shares should be subject to seizure by your creditors but they would probably need a court order and that would be costly for them. I am not a bankruptcy attorney, but I would think your creditors would be happy that you have started a business and are trying to make money to pay them back. Best thing to do in my opinion is to communicate with them and let them know what you are doing your best to try...
You should review the agreement with an attorney. If that seems economically untenable based on factors you have not added in your question (e.g. size of the contract), then suggest that you discuss openly with your vendor, offer to pay for the five hours, but say that you do not want their services anymore because you are unhappy with them. Also, as a hindsight is 50/50 remark, always better to have attorneys review contracts before you sign them.