Do you have a pick up & drop from DFW ?
You can find information about ground transportation (taxi, shared shuttle) here: www.dfwairport.com/transport/index.php.
The is also a public transportation option, depending on where in Richardson you are trying to go & when you are arriving. It would involve connecting to the DART Orange Line through downtown Dallas, then out to Richardson and would take about 2 hrs. Maps & schedules can be found at www.dart.org.