There several reputable online conversion dealers the will buy Canadian i and send U.S. Cash in return WWW.canadiancoinexchange.com is very good and provides a good conversion rate. Eurocoinexchange also takes euro's and other coins.
Most airports will not exchange coins other than coins in their own currency, so if you want 100 Australian dollars in Pearson (Canada) they will usually give you the Canadian amount (with Canadian Coins), if you want 100 Canadian dollars changed, they will give you the balance in Canadian coins. Donate the Australian coins to charity.
To exchange Canadian dollars to US dollars, log on to CoinMill, where you can convert your Canadian dollars to US and many more countries you would like to exchange.
The exchange rate is currently at 1.01 Canadian dollars for 1 Us dollar. This means that 10 US dollars would be about 10.10 Canadian dollars after exchange.
If you live in Canada, I believe net coins are the best option for buying cryp tocurrency.
US coins are worth more than Canadian coins. If you pay in US currency in Canada, the vendor makes money. If American vendors allowed the reverse, they'd lose money.
Not usually. Unlike Canadian coins which have roughly the same purchasing power and diameter as US coins and are frequently found in change (chances are you have something Canadian in your change jar, especially if you live close to the Canadian border), Mexican coins don't follow the same diameter and purchasing power so except for towns close to the border where they are readily exchanged to US dollars (and you'd pay them in the exchange rate of Pesos to dollar) most places will not take Mexican coins in payment.
Exchange them for local currency, or try selling them.
According to the Canadian Counsel they encourage the use of Canadian coin as well as US coins. The use of US coins makes no sense because it holds no value in Canada.
Most banks and currency exchanges don't want foreign coins. They rely upon being able to re-sell any currency they buy to a subsequent customer, and they know that they will be stuck with all the coins they buy from you because nobody traveling overseas will ever ask them for a large quantity of coins. Your best bet is to use one of the mail-order currency exchange companies which specialize in foreign coins. Search for "exchange British coins for dollars", "exchange euro coins for dollars" or "exchange Canadian coins for dollars" and you will find a few choices. There are a handful of main players in this business, located in either the US or the UK. They have been around a while and are quite reputable.
what kind of coin is it
yes
Canadian coins are face value is the U.S.