Is it obligatory for fasting to be made up consecutively, and is expiation (kaffarah) required for one who was unaware of the obligation to make up fasts, and is it permissible for the expiation to be paid from someone else's money or from personal gifts, and what is the ruling on delaying the making up of three months [of fasting] until after Ramadan if it was not possible to make them up before it?

You are not required to make up for the days you missed some obligations during Ramadan as long as the fast itself was valid. However, abandoning prayer is a grave sin that necessitates repentance. Regarding prayers intentionally missed, there is a difference of opinion on making them up. If the fast was broken due to ignorance of what invalidates it, then no make-up is required. But if the breaking of the fast was intentional due to negligence, then making up the fast (qada') and paying expiation (fidyah) are obligatory for each day whose make-up was delayed past the following Ramadan, unless she was unaware of the impermissibility of the delay, in which case there is no expiation. Your father may pay the expiation if you appoint him to do so, and if you are unable to pay it, it remains a debt upon you, and it is permissible to pay it from any money you own. If there is not enough time to make up all the days before the next Ramadan, then make up what you can, and the remaining days will remain a debt upon you to make up after Ramadan.