Assessing lifestyle and cost of loving on Germany (Hildesheim)for a prospective move (couples)

I’m currently in the process of an arranged marriage and speaking to a guy who earns 85 lakhs per annum (after taxes) in Germany. I wanted to understand what kind of lifestyle we could have there. Could you please give me a basic idea of the monthly expenses? I’m asking because I’ve never been abroad before and don’t really have any idea about the cost of living.