I believe the freon needs to be charged in my 2010 jetta tdi. How do I find out the freon information needed in order to have some one in my family do it?

Newer vehicles use R134a refrigerant...it is much less harmful to the environment. Understand that the AC won't get very cold until you are moving air through the radiator/condenser. Don't expect to sit at idle and create a snow storm. R134a is not as efficient at heat transfer as the older refrigerants, therefore, it takes more airflow over the condenser to produce the desired cooling.