If your country's local law rules allow then it's legal other wise it's illegal. Some county law allow it and some not allow it. So first know your local rule and then after driving with headphones.

As per my suggestion yes, it's legal to carry a machete it around in your trunk. It's one kind of safety kit as well as a little weird for you. It's good for self defense.

Yes, you definitely renew your insurance from insurance company. So if you get insurance coverage after the damage is already done. when you go to pay the excellent they will want to see evidence of insurance coverage.

I think you should take advice by traffic lawyer. Because only traffic lawyer can solve your problem. A traffic lawyer will surely gives a good tips about traffic licence suspension.

Yes, Car accident injuries can be very scary, so whenever you face any car accident then I must says that your first step is to call a police. You should obtain the police report against them. And then after you should have to call a car accident lawyer.