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It all depends on what you're going to do. Will you be janitor or CEO?
Taxes and other deductions depend on your personal circumstances so that's also difficult to say.

Hi , I am a software Test engineer with 5+ years of experience in automotive , embedded domain

This site would be a good starting point for your research:

@chiku

The base template of costs and the main ones in my opinion would be ;

> Accommodation (furnished or unfurnished)
> Commuting to and from work,
> Food expenses
> A vehicle (if needed)
> Tax of the country you live in

Then the other costs can be related to your life style..

> Entertainment (socializing, going out + eating out)
> Holiday

This is just a general outline.

Benefits, i'd push for is paid flight cost home (annually) & Medical cover.

Hope this helps.

Taxes and other deductions depend very heavily on your personal situation. Thus no company in Germany will offer you a guaranteed nett salary - you always negotiate gross salary!
You can estimate the deductions on (only in German). Some of them you may get back (again depending on your personal situation) at the end of the year. The system is VERY complicated and only a professional tax consultant (whom you'll need anyway to prepare the yearly tax declaration) can realistically explain it.