Kufr

Q: We all know that qadayanis are not Muslim as they do not believe in khatm-e-naboowat sallallahu alaihi wasallam. If a qadaayani becomes hafiz of the Quraan, what would happen to him/her in this case as he is not a Muslim?

Q: I recently discovered that some of my past actions were kufr and I sent some messages containing shirk. I have sincerely repented and vowed never to do them again. I made a general taubah regarding all my past actions then recited kalimah.

1. I would like to ask if it is necessary to repent specifically for each action as all I have thought about since is remembering specific kalimat I said. Do I need to do tajdeed e iman again if I remember those past actions after making general taubah?

2. Also do I need to perform ghusl after tajdeed e iman?

3. Can tajdeed e iman be made whenn one is junub.

4. What about my prayers that I said while not realising my kufr?

Q: I suffer from doubts regarding many things. I am constantly remembering jokes and statements I made in the past that may have been statements of kufr. I have recently read about people singing certain songs that may have taken them out of the fold of Islam. Alhamdulillah I do not listen to music anymore. However I remember listening to and singing the same songs many years ago. I did not know the meaning of these songs at the time. I am now doubting the validity of my nikah and legitimacy of my children due to my actions prior to and after nikah. Is my nikah valid if I have commited these actions prior to nikah?

Q: If someone got a problem and instead of making dua to Allah he tries other ways to come out of it. Is this low iman or kufr. (He is not making dua because he thinks that maybe Allah will not fulfill his duaa.) E.g. A financial problem came to him. He starts asking people for money. He doesn't make dua for the same reason above. Is it kufr or low iman?