Western Society

Islamic rules can never be irrelevant in any time or place. Islamic rules apply every where and every time according to its conditions  and the circumstances. Polygamy has its own conditions for those who need it. Western monogamy is just a claim when their own studies confirm that most of them have illegitimate affairs during marriage while Islam is frank and clear in dealing with matters by organizing a system to protect people from sinful sexual behaviour.

Wassalam.

Islam does not accept accusations but asks for concrete evidence to stab lush whether the person committed a crime or hot. Muslims must follow Islamic Sharia.

Wassalam.

Yes it is permissible to borrow money to use it in buying house or in any other lawful cause.

Wassalam.

Every job is allowed to do as far as it does not involve any sinful act.

Wassalam.

Hijra is migrating from a place to another place for the sake of preserving your faith and religious practice. Migrating from a place where you can not practice your full religious duties to a place where you can practice your religious duties freely is a type of Hijra for the sake of Allah (SWT).

Wassalam.

Jobs in Western and Eastern societies include good and bad elements. Muslim must avoid any wrong job which means the job which involves Haraam act whether it is Western or Eastern or any where in the world.

Wassalam.

It depends on the nature and the effects of your work. If your work does not harm any one and does not involve any wrong act on people, then it is allowed. If you are in doubt, then you may consult local trusted pious Ulama in the area where you are working now.

Wassalam.

To be in a place of competition of swimming with women itself  is not permissible for Muslim man. Obviously swimming dress of women in the West is un-Islamic and we can not look at women with out full Hijab.

You should save yourself from such places where you look at women with out proper Hijab.

Wassalam.

If you are sure that you will never help in usury or any unlawful (Haraam) work, then you can work in such legal firm.

'Wassalam.

We are not dealing here with legal matters nor giving any legal advice. We are dealing with Islamic matters and reflecting the rulings of the leading scholars ( Maraaji' of Taqleed). Muslim should not break the law of the country where he lives unless it contradicts with his faith and religion.
Main matter in second marriage is fulfilling the Islamic conditions of practical justice between wives. If this condition is not fulfilled, second marriage will be not permissible in Islam.

If your question is a legal question, you should ask your legal adviser.

Wassalam.