Hate to be the bearer of bad news, but I don't think any one on this site can tell you how to make this outfit step by step. Rather, you may want to design your own outfit based on commercial patterns and what materials you want to use.
For example, there are tons of cape patterns on the market, look for one that calls for lining. You can modify the hood to look more like the Assassins' design; there are YouTube videos on how to make it by Mueldex. He has tutorials for various parts, and you can follow them using tee shirts, lace, red fabric, etc...
Just go one step at a time; make patterns out of newspaper so you'll know what to cut out, and where to sew/attach your pieces. Hope this doesn't discourage you from making this. Good luck!