If someone dies of heart failure, any type of heart failure , will there be a rise in troponin levels ?

Not usually: Troponin means damage to the heart muscle. In failure brain naturetic peptide goes up(BNP) and that is what is chemically followed

Troponin : Troponin I is a marker for acute ischemia of heart. However we also see it in patients with kidney failure. So it will not be prudent to say that if Troponin I are elevated that specific for heart failure. As heart failure can be due ischemic or non ischemic causes.