Last rites is not a sacrament in the RCC. The Last Rites, so called, include the sacrament of Unction or Healing (formerly Extreme Unction), but also other prayers and actions. Nor is Marriage a sacrament. Matrimony is a sacrament, but marriage can occur and be recognized by the RCC as valid even without the sacrament.
But, yes, all the Catholic churches recognize seven.
Now, do they all clearly meet the rough definition we have roughly identified? What is the physical property used in Reconciliation (Confession)? did Christ ordain or establish Marriage or Matrimony? He performed his first miracle at a wedding that was already occurring. Those and others like it preceded that one.
But...Christian baptism is NOT identical to the kind of baptism the Jews knew and John the Baptist is associated with, right? The answer to *How many?* may not be a snap.