In Debt

I’m 40 years old and just received $50,000 in inheritance. I want to save and/or invest it for my retirement instead of paying off credit cards (2 cards totaling $15,000), but obviously I need to take take of my debt too. I make enough money to put about $1,500 per month towards cards the two cards. What’s the best strategy here?

I did not file in 2002 because I owed taxes and could not pay. Since it has been more than 3 years, I don’t have to worry about it, correct?

My credit is good, but my fiance’s credit has some issuess, such as not paying bills on time and bounced checks. When we get married, how will that impact my credit score?