Must I make up the days I missed five years ago due to illness, after having paid the expiation? And am I obligated to pay another expiation, and what is its value?

You must make up for the days you missed in Ramadan (definition). The expiation for delaying the make-up fast (qada') is obligatory for anyone who intentionally delays making up the fast without a valid excuse until the next Ramadan begins. If you give it out before making up the fast, it is still valid. However, if the delay was due to illness, ignorance, or forgetfulness, there is no expiation. The original form of expiation is to give food (750 grams of the staple food of the country), and it is permissible to give its value in cash.