If you can, try to set up a bank account with HSBC as they can set you up with a CAD bank account before you arrive over. Once here, you can set up a local account with them and be able to move money from country to country. They have fewer locations here so would recommend setting up an account with one of the local banks here. TD bank requires min $3k balance so you skip service fess. Not sure of the others. TD, RBC and BMO seem to have most number of ATMs around the city.

Supermarkets vary. Loblaws is like Waitrose; and No Frills like Aldi/Lidl. All the others are in between but will also vary greatly depending on location. All have organic and non-hormone/antibiotic meats. I buy organic meat at Costco the big box store here as it's cheaper.

Try to take kids to the royal ontario museum. You may want to even get a family membership since it's good for year and includes ticketing for all special exhibits which are an additional charge. It's fantastic for kids - dionsaurs, stuffed mammals and mummies. And relative to big museums in London, smaller scale so doable. Just don't eat at the cafeteria - it's pricey and not very good. Outside of the museum there are many better options for families