Transit pessanger can easily find the lounges insinde the departure hall in CAN? How much charges?

Well, yes, there are several transit lounges inside the departure hall. You can find them easily according to the clear English sign. But as I know, most of them only receive first class and business class ticket holders.

If you just hold an economy class ticket and only have a few hours stopover, you can just stay at the public area of departure hall. There are chairs for you to take some rest. :-)