Call up the new boss, explain that your dad won't let you bike to work as you planned, thank him for the job, and move on - to try to make dad buy you a car. Or keep living at home for free as long as they will let you. That's not so bad either.

If pops does not offer any solutions, just keep being a kid until you can go off to school or move out of the parent's house. Things could be worse.