It doesn't make sense because "Not even should i die will ibhand it over" is not a correct phrase, "over my dead body" is the phrase that oftenly used in such situations.

I'm fluent in English, Arabic native speaker interesed in learning Italian and Turkish and exchange cultures.

"I'll do this by 11" means that you will finish something at 11 or before 11 the proposition By is mainly used to refer to a deadline, So its used to indicate time. You can't use To because to is used to indicate place or person. Example: I have to submit my assignment by 11. I have to sumbit my assignmet to my professor.