I would omit 'to' because 'abroad' means 'in or to a foreign country' according to Longman, but I am not a teacher.
Student or Learner
I want to ask someone if Ram went to abroad or not. May I ask in either of the ways:
1) Did Ram go to abroad?
2) Has Ram gone to abroad?
Matthew is right. We simply "go abroad", meaning "go to a foreign country".
Did Ram go abroad?
Has Ram gone abroad?
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.