All the questions raised in your post fall within the entire spectrum of Labour Laws in force in our country and therefore it would be very difficult for any one to give straight-jacket answers. The profile of your employer as presented in your post also seems to be inimical to unionisation and as such his acts of retaliation, if any may cost all your employment. Therefore, instead of forming a new union for yourselves, you can consider joining a powerful general workers union having affiliation with some All-India Federation functioning in your place. Such seasoned union leaders are well-informed in industrial relations and approach your management with maturity and solve your problems amicably.
13th October 2015 From India, Salem