Drove. Well maybe you didn't know how to drove before surgery?
DWI. Interestingly, if stopped by police, you can be given a ticket for Driving While Impaired, the impairment being the boot or cast, even if it's on the left foot. Just an FYI.
Need info. As long as you have the use of your right foot you should be able to drive in the same way that you did prior to surgery.