No you don't. A valid license from another province or country and/or international license is sufficient. Even a learner's license, or Class 7, is eligible for insurance coverage but does include some restrictions. If you have any more questions, a broker can give you additional information regarding your licensing.
Full coverage is always a good idea. The newer the vehicle, the more expensive it is to fix. Unless you're driving an older vehicle that does not have much value, you want to carry full coverage. This ensures your vehicle will be repaired whether it was your fault or not.
The payment options will vary depending on the insurance carrier. There are options for credit cards as well as monthly automatic withdrawal. This can easily be arranged with a copy of your "void" check or direct-debit form, on the monthly withdrawal date of your choice.
Yes, only with your permission, but remember that lending your vehicle also means you're lending your vehicle's insurance coverage. Any accidents or claims that occur during this time will be on your insurance history and may negatively affect your future rates.