Business and Dealings

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?

Unintentionally purchasing a heart shaped doughnut on Valentine's day

Q: I bought a donut from Dunkin Donuts because I was hungry and it ended up being heart shaped because of Valentine’s Day. I do not celebrate Valentine days and did not know that it would be heart shaped. I was not sure if I should return the doughnut but did not want to waste food so I ate it. Did I commit kufr or a sin ?