Is it good to have multiple insurances from the same provider? Which provider has all - health, car and travel?

It is highly recommended that international tourists visiting Canada must get a Travel Medical Insurancefor their visit to Canada since healthcare can be very expensive without proper health insurance coverage. Typical travel insurance for Canada covers accidental, medical and travel emergencies during your stay in the country.

There are more FAQs at the link provided. Have a safe trip!!! https://www.visitorscoverage.com/insurance-for-visitors-to-canada

You should consider the rates as well as the quality of coverage that you are getting. You might even try to compare the prices of the policies, as well. I think, you can try out http://www.cholainsurance.com/ and find out what they have to offer.
General Insurance Company India Health Insurance Car Insurance Travel Home...

A PPO covers many of your health care needs for a small per-visit fee if you choose from the list of "preferred providers." You can choose to see a doctor who's not on the list, but you'll foot a greater part of the bill and may have to pay a deductible. Some PPOs do require claim forms. where as Indemnity insurance doesn't cover the total cost. Coverage is usually limited to a percentage of the billed amount.
To know more you can check the below link http://www.mass.gov/anf/employee-insurance-and-retirement-benefits/oversight-agencies/gic/epo-ppo-hmo-the-alphabet-soup-that-tells.html

Really? That is a car and truck question?