See the symbol at the end of my image. I know that this is the symbol for esc and that it is referred to as a BROKEN CIRCLE WITH NORTHWEST ARROW (U+238B) but i dont know what font its from. I can see it on my MAC but on WINDOWs it turns into a square. Can you please help me to find the font to download.

From Wiki:
On computer keyboards, the Esc key is a key labeled Esc or Escape that is used to generate the ASCII Escape character (Control-[, ASCII code 27 in decimal), the character code traditionally used to initiate an escape sequence
The key is indicated as a circle with an arrow through it (U+238B) as defined in ISO 9995.

Gill Sans  Suggested by SashiX 
Lucida Grande  Suggested by claudeserieux 


Myriad Pro  Suggested by notfon1234 

http://www.fontspace.com/unicode/char/238B

Rail Model

http://www.fontspace.com/search/?q=rail%20model

Another font for "esc"

As for that symbol, try to investigate what font is used in Mac.

Lucida Grande

Looks a LOT like Myriad.

Gill Sans Light + Lucida Grande

http://cjoint.com/11mi/AEhawgroq6T_GillSans_LucidaGrande.png

Legal : install safari

And then uninstall it if you don't want/like it. Nice move, claude