Yes.
Depends on where you are, what company you're going with, and the terms of your plan. Ask your insurance company this.
No, you typically cannot have two different car insurance policies for the same vehicle at the same time. It is important to notify your current insurance provider if you are considering switching to a different company.
In Canada - no.
Yes, you can as long as they are not from the same company. There is usually a standard provision in travel insurance policies that prohibit you from buying more than one policy from the same company however, it does not apply if you buy from a different insurance company.
yes, they will treat it as if the primary was a different company. You pay two premiums. If they do not, contact the DOI.
Not on the same car in most places. If they are different cars, sure.
No, you are not required to insure all your cars with the same company. You have the option to insure each car with a different insurance company if you choose to do so.
YES, you can have multiple insurance policies, from different companies or even from the same company. Each company has it's own rules of how much life insurance someone can get. You can get quotes from multiple companies and have life insurance policies issued simultaneously from different companies. You should work with an insurance agent that has access to multiple insurance companies and can advise you what requirements each company has, and the limits they are willing to issue for life insurance.
Two people in separate households can have the same insurance policy. Usually, you can give the insurance company separate garaging addresses.
Absolutely. There is no regulation that makes you have auto and home insurance or any other insurance cannot be mandated to be with the same insurance company. Often it is to your benefit to have them with the same company because of discounts they offer in exchange for having the coverage with the same company.
Yes
Yes, A person can take multiple health insurance plans form same company or from different company. In fact it is a good idea to take two health plans from different companies and diversify.