What is the ruling of Sharia on starting a casino or working in one?

I used to serve in the Jordan Armed Forces. I have doubts that during my service I took, by mistake, an amount of money. Will I be cleared from liability before Allah if I gave that amount to the Social Solidarity Fund of the Military Iftaa`, as "clearing liability" is one of this Fund`s resources?

Is it permissible for me to supervise, not sell, dissertations for post-graduate students? What about helping with certain parts of the dissertation: statistical studies,  theoretical framework, plan, defense and analysis, title, and proofreading?

What is the ruling on a person who applies to get fuel subsidy given by the government and meant for poor family whose income is less than ten thousands Jd per year, although the conditions of fuel subsidies don’t apply on him and he already have a job in which the party accountable for fuel subsidies unable to detect it?

The company where I work has obligated me to insure for employment injury as a condition for attending a specialized course. So, I insured with one of the commercial insurance companies. Have I incurred sin by doing this? In case I sustained an injury, is it permissible that I take the insurance benefit?

A previous administration of a charitable organization made a lease for 5 years to a financing company that deals with usurious transactions. Are we (The new administration's members) accountable for this? since we weren't members of the administration at the time of concluding the contract, yet we still deal with the aforementioned company due to the nature of our job?