insurance to cover other driver? How can you negotiate with car insurance agency after a wreck that was caused by you if you have no insurance to cover the other driver? Are there any legal ramifications?

There's not much to negotiate. You owe the other driver, for their damage and bodily injuries, in full. Period. That insurance company will take you to court and garnish your wages. You can't "sette", for example, for $.50 on the dollar. "Settling" will come after they go to court and try to collect. It might take 4-5 years of them trying to garnish wages unsuccessfully, before they sell the debt off to a collection agency that will be willing to settle.

Basic liability insurance will cover the other driver up to your limit. Did you have any auto insurance? If not, you are in deep !#$$$. If you do than it should already be covered.