In Canada, there will be no amount of taxes due from the receipt of a gift or inheritance in most circumstances. The giver of the gift may have a taxable event occur if they are gifting capital property. The gift will be deemed to have occurred at fair market value, and the gifter will have to pay any taxes owing on the capital gain, if any.
If money or capital property is gifted to a non arms length party, the rules of attribution may apply.
If you receive a gift from your employer, it will likely be considered a taxable benefit and therefore income to the employee. The CRA website provides employers a series of questions in order to determine if there is a taxable benefit. Pleasee see: Rules for Gifts and Awards.