salaah

Is becoming a good person more important than performing salaah?

Q: I have some doubts in my mind. Mostly people say offering prayers is the first thing every Muslim should do even if he is committing any sin. I have a question does Quraan really say that offering prayers is the first priority and becoming a good peson who does good deeds is secondary thing because in todays world we see many people who offer prayers but commit sin and on the contrary there are people who are good human but dont pray. So I really want to know what Allah says about this is becoming a good person more important or offering prayer. Although I know that mostly people say that through prayers one can only become a good person but what about those who perform good deeds but dont offer prayers that too often

Mistakes in qiraat

Q:

1. How will one correct themsleves if they make the follwoing mistakes in Salaah.

1.1. Doubt which word it is and so reads both e.g. ya'lamoon and ta'lamoon

1.2. Gets stuck and cannot complete the ayaat

1.3. After completing the salaah (nafl or fardh) realise they read an ayah incorrect or missed out a part 

Forgetting to make sajda-e-sahw

Q: I forgot to perform sajdah sahw which was wajib upon me during the first 4 rakats of sunnah namaz. Then I started Fardh namaz and once I finished fardh namaz I realised that I forgot to perform sajdah sahw for sunnat namaz. Is it permissible to perform the missed sajdah sahw of the sunnat namaz after the fardh prayer?