To be honest you have to notify DVLA and will more than likely have to rescind your license, it is a notifiable condition.
The DWP run an Access to Work scheme which will either help or cover the cost of transport for you to get to work.
https://www.gov.uk/access-to-work
I would say you do have a case to claim PIP but get help to fill the "tomes" in from a Welfare Rights Adviser as they are daunting. With that sort of help you should have a better chance of success. If you fail to get an award then you will have to appeal if you still believe that you are entitled to it