Interest and Gambling

Using money and calculating zakaat from a life insurance payout

Q: I had taken out a life insurance policy with a dread disease cover many years ago. (I call that my pre-hidayat days). I have now been paid out part of the money for a dread disease, which is part of the life cover. Can I calculate all the premiums I paid over the years and take the money out of the payout as halaal money for myself? Can I use the balance of the payout for Income Tax payment. I would then cancel the policy. 

Also, what are the zakaat implications regarding this money if it is halaal. Do I need to calculate zakaat from the time I started paying the premiums or not?

Bank competition

Q:

1. A conventional banking company runs a competition where a car can be won. Entry to the competition is free and open to customers and non-customers of the bank. The banking company itself will be the entity awarding the prize, not the car company, nor any other entity associated. Is entering such a competition permissible?

2. Similarly, a bank is offering branded pencils, pens, rulers, key rings, notebooks, etc. as gifts to customers and non-customers for marketing purposes. Will this be permissible to accept and use?

Purchasing a car on interest

Q: Person A has said that for a self employed person who has to declare his profits at the end of 1 year in the UK, it is jaaiz for him to purchase a car on interest because if he does that, he’ll be paying less tax to the government as he believes that tax is haraam.

He says this isn’t permissible for a person who isn’t self employed as such a person pays tax according to his fixed salary irrespective of where he spends his wage on. (He says that this is how the system works in UK for tax.)

What is to be said of this?