Does anyone use pascal and what for?
Is there a better editor than borlands delphi?

Is pascal worth using/learning?

Can anyone advise if R or python would be more useful?

Pascal/delphi isn't bad as languages go, although it's showing its age these days.

If you want to learn a language that will be useful and help you get a job then definitely learn python. It has a good community and a large number of useful libraries available for everything from machine learning to Web development.

Thank you @conjoiner

Go for Python instead of R