There both "emo" neither one is more "emo".
Yes, it's OK to mix ash brown and medium brown hair color together. The ash will help neutralize the reddish tone that would normally appear if the medium brown color was used alone.
With the target color being medium golden brown and the starting point is a medium orange, I would go with a medium ash color + 20 volume developer. If you used a medium gold or a neutral, these colors would add too much brass to that already brassy orange. After using an ash color, the hair may seem a little dark at first. Once it's washed a few times, it should be at about the target color.
A medium purple
no because if you have three different colors then it would turn a different color.
If you have a light to medium olive skin tone, the color blonde that would look best on you is dark brown.
well warm brown im assuming would just be a kind of medium/light brown color but still not the same as the chestnut though.
I have the details you described and everybody likes the color purple on me, so I would go with a purple dress.
Mixing orange and indigo would result in a shade of brown or dark gray, depending on the proportions of each color used.
A good espresso is dark covered with a tan layer of crema (the emulsified oils of the coffee extraction) on top.
probaly black or leave it nateral.
brown
well although i have never actually colored my hair i do have some experience with picking out colors. You probably could re dye it although i would wait a little just in case because you don't want to damage your hair. I would add in maybe a light red or some light brown or caramel highlights to pick up the dark, dull color brown.