1. It's great if you like science. For one thing, you get to work in a lot of different scientific areas instead of getting pigeonholed into one area. Second, you make a lot more money than you ever would as an engineer or scientist. In those fields you often have to stop doing science and get into management in order to advance past a certain point. As a patent attorney you can advance as far as you like and still get to do the interesting work.
2. There are so many different areas you can go into, it's hard to say. You can do patent application preparation and prosecution, you can do transactional work, you can work in acquisitions and due diligence, you can work in licensing, infringement and validity analysis, litigation, writing appeals -- the list is endless. Also your experience will be different depending on whether you choose to work for a corporation or in a law firm.
3. Biochemistry is a good field to be in if you intend to be a patent attorney, because patent attorneys with degrees in biochemistry are in demand. Whether biochemical, chemical, or electrical/mechanical engineers are more in demand varies year-to-year, but don't let that worry you. Take the course of study you love the most; that's the best way to ensure success whether you go on to be an intellectual property or patent attorney, or whether you stay in the scientific field itself. Patent attorneys have usually majored in electrical or mechanical (especially electrical) engineering, chemistry, biology, or biochemistry. I majored in physics.
4. I don't know what the starting salary is these days. When I started in 1993 in Washington, DC I started at $70,000/year at a law firm, but I'm sure the starting salary is much higher than that now.
5. In the United States, yes, you need to be a lawyer in order to become a patent attorney, as well as have a bachelors degree in a scientific field. So of course you have to go to law school. You could be just a patent agent with only a scientific degree, without going to law school, but they usually get paid much less -- when they can get work. Also, any attorney can be a litigator, and litigate intellectual property (patent, copyright, trademark, etc.) cases even if they haven't had a technical degree!
6. Most people take the patent "bar exam" soon after starting work for a law firm or corporation. I took it my final year in law school, which I believe helped me in my job search.
7. Most law students who want to go into intellectual property law get a summer internship at an intellectual property law firm after their second year in law school.
Yes. It is legal. The insurance company can require you to correct problems to avoid claims. You have a condition that you are required to comply with their conditions in order to have the policy. You must correct the issues or they will cancel your policy.
If you feel you need help contact the Department of Insurance or Insurance Commissioner in your state.
Bottom line: Do what the insurance company asks you to do if you want to keep the insurance. And, if you don't no other insurance company will take you either.