Convert JSON string to Key / Value Arrays
Python, 27/30

To actually comply with the rules:

keys=lambda x:list(eval(x))
vals=lambda x:eval(x).values()


Python, 30

Just using one function:

lambda x:zip(*eval(x).items())


This will separate the keys from the values and return them in a list.

Python, 7

If returning a dictionary is allowed, then this is all you need:

eval(x)