electrical warning light - cannot drive only moves in revers

Please can someone help me, I have a renault clio rt automatic - J Reg
Yesterday it stopped driving, I can reverse but it wont drive, is it my gearbox or an electrical fault.
Not sure whether its worth fixing or buying a new car ?

I do hope someone can help me it has cost me a fortune to get on the road, I only taxed the car yesterday and 15 mins later it wont drive.

Please help this distrssed lady sort her car out !!!

Thankyou