1) What might the bank can do to recover the money? Is employment bond legal today?
The employment bond will be valid to the extent of the training expenses for the training given to you on some specialised courses for the benefit of the bank etc. Let them file a recovery suit, you can challenge the same on the basis of their claim and reasons set out therein.
2) Whether further procedure of bank involves police inquiry and court proceedings? Please explain in detail.
This is not a criminal offence hence bank cannot approach police or this.
3) If i wish to fight against bank will it affect my carrier ? because i have another job in hand awaiting confirmation.
The fight back against the bank will be to defend yourself from the allegations made against you, hence this will not carry any adverse impact on your career or to the other job you may choose.
4) Please suggest me safest possible way to clear this mess paying as less money as possible and without legal hurdle which may affect my future job.
If the bank decides to recover the money as per employment bond, you dont have any option than to challenge their claim legally, for this you have to visit court on dates of hearing or engage an advocate who shall represent you and handle the case properly.
This may involve litigation cost which you have to bear.