Where can I find all Sly Mask and Treasures location in each episode?

Some treasures are in costumed areas which can't be accessed unless u have a certain costume. when u get the thief costume in episode 5, u can start looking for those treasures. Sly Masks aren't just in the main area. some missions also contain the masks so look around as u go.

slycooper.wikia.com/wiki/Secret_Sly_Masks

All the mask locations.
Not sure I can help with the treasures though.

Check out the Maxed Gamers on youtube. They have all Bottle, Treasure and Mask location compilation videos.
youtube.com/user/MaxedGamers/videos?

Check out Happy Thumbs Gaming on Youtube. It provides good detailed locations of the treasures and masks for each episode, including the prologue/epilogue. It also gives good help on most of the trophies in the game as well.
The link below will take you the video playlist made by HTG.
www.youtube.com/playlist?list=PLs9rvQZdz2r7Czmb5V6v8nukLfpmYX7Qn

Hope this helps :)