1：如以重婚及用假身份欺騙起訴他，他是否有很大機會開脫，不需要麵對至少1年監禁。（他揚言他會沒事
All you can do is to report to a local law enforcement agency. A district attorney will determine whether to prosecute a polygamist. Sentencing is up to a judge.
2：如法院核準他重婚，如他真的得以開脫牢獄懲罰，是否仍會有犯罪記錄跟隨他終身，是否有性犯罪的記錄，是否會影響他今後的 工作。
At least in California, polygamy is not a registrable crime under Penal Code 290 (c).
3：在起訴他重婚的同時，我是否可要求經濟賠償。
You may. You will need an experienced family law attorney to access your situation and find some creative grounds to sue for damage, such as marriage fraud, breach of contract, misrepresentation, etc.
4：我將我和他之間的事實用文字，照片的方式通過郵件公布給他的社交圈是否我會涉及法律責任。
I would advise not to. Depending on what you say, it may cross the line of defamation.
5：起訴重婚的刑法律師是否同時幫助我爭取撫養權，撫養費及經濟賠償。
No. You will need a family law attorney for custody, support, or any damage you may be entitled.
