Yes
You need 1 stamp to mail a letter/package throughout Canada
Currently as of 2011, it costs 59 cents.
As of October 2011, Canada Post domestic lettermail costs $0.59
Yes, according to the USPS "Frequently Asked Questions" site:Can Forever stamps be used for international mail?Customers can use Forever stamps for international mail, but since all international prices are higher than domestic prices, customers will need to attach additional postage. The value of the Forever stamp is the domestic First-Class Mail one-ounce letter price in effect on the day of use.http://faq.usps.com/eCustomer/iq/usps/request.do?create=kb:USPSFAQ&view%28%29=c[c_uspsse10242011]&varset%28source%29=sourceType:embeddedSince "forever" stamps (as of Jan 2012) are worth 45 cents, and mail to Canada costs 85 cents (as of Jan 2012), you can use two "forever" stamps on the mail to send it to Canada.
75 cents is the cost of sending an ordinary letter to Canada from the US.
Yes
typicaly 2 stamps
You need 1 stamp to mail a letter/package throughout Canada
No you cannot use them. Forever stamps can only be used for domestic (inside the US) mail. They must have a value on them for international mail.
For a regular letter, two.
500 if your in America/Canada
Currently as of 2011, it costs 59 cents.
When mailing a letter or package you always use postage purchased in the country you are mailing from. So if you are mailing a letter from the USA to Canada, you would buy stamps at your local post office.
Yes, you can use regular stamps on first class mail. Most letters that you would mail only take one or two stamps.
If it's a regular first-class regular letter, 45 cents worth of stamps for one ounce of mail or one Forever Stamp.
As of October 2011, Canada Post domestic lettermail costs $0.59