Question

I have a syntax error

http://pastebin.com/KVVwk6sa

Answer 1

Try removing the ' '. The syntax is for char in x: if char == symbol. By the way, the assignment is also without quotes, and you don't need to create another variable for that.
for char in string: if char == symbol: count += 1

Answer 2

This would be more simple though:
http://pastebin.com/KtJifWD9

Answer 3

x and 'x' are vastly different things. x is a variable that can point to anything. 'x' is a string with a single lowercase X in it.

Same for symbol and 'symbol'. One is a variable, the other is a string with 6 characters in it.