1. I believe 3rd part liability insurance is included in rental charge (at least in BC and Alberta). but better confirm whether it is included and the max coverage of basic (1M should be enough)when renting. Ask agent to write down "customer decided to buy this insurance because basic 3rd part liability was not included in rental charge" if they insist it was not included.
2. you have to check Visa department of issuing bank. they should know the policy. check what kind of vehicle, where, and max coverage, how many days max, and deductible (how much you have to pay before their money can kick in), actually you have to pay all the cost, then you claim your money back from insurance.
some note on LDW/CDW:
without any backup plan (such as LDW/CDW waiver), better buy rental company's insurance, a small windshield chip (as samll as 2mm)can cost you 80-2000 CAD.
if you have some kind of coverage, at least rental company couldn't grab money from you without limit because later insurance company will pay and they want to see how they repair the vehicle.
This is not to say rental company's LDW/CDW is not necessary, even you have your own insurance or credit card can cover damage. dealing with insurance company is painful too. also they won't cover the cost (days vehicle couldn't be used because damage)
3. not true. I don't see difference between these big companies, my suggestion is using Priceline to bid at least 2 months before your renting, normally you can get best price.
1。简单说,包的。复杂点说,如果你有车险但是不包,或者你没车险,它都包,但是是最低的,也就是说可能不够用。
2。信用卡是不是包你的租车保险,你要询问你的发卡银行,但是据我所知,中国的银行发的卡绝大部分都不提供这个服务。好像只有一两张包租车保险。建行应该没的。
3。两家差不多。