Witr and Nawaafil

Q: I prayed witr salaah with three rakaats. Meaning, my witr is similar to magrib salaah but with a Surah and then duaa qunoot in the third rakaat. Is this the correct way of reading witr salaah?

Q: I started praying the 12 Sunnahs prayer. However, I want to pray four rakats after Dhur and not two because four is recommended. Are the four rakats after Dhur with two tasleems like the four rakats before Dhur?

Q: What are Sunnat-e-Muaqqadah and Sunnat Ghair Muaqqadah Salaah?

Q: I only perform "Fard" and not Sunnat sometimes when I am tired or hungry.

Q: If we offer nafil salaah sitting, then is there extra sawaab in it?

Q: Are there any particular Surahs or zikr/tasbeeh to be recited during istighfar Salaah? Because in one book I read it says that one should perform istighfar salah two rakaats by reciting Surah qadr after Surah Fatiha and recite Astaghfirullah 140 time in total. Is this true? Is this the way it should be performed? Please clarify and guide me.

Q: In the English translation of Behishti Zewar, Heavenly Ornaments, it says under 'The time of Salaat', 'Rules Related to the Times of Salaat', that: "Once dawn breaks and fajr time enters, then apart from the two rakaats sunnah and two rakaats fard of fajr salaat, it is makruh to offer any other nafl salaat. However, it is permissible to offer any qada salaat and to make sajdah-e-tilaawat." (1) Does this mean that if I happen to perform the two rakaats sunnah at home, it is makruh to perform Tahiyyatul musjid when entering the Musjid? (2) Does this also mean that if I do not perform the two rakaats sunnah at home, it is makruh to perform the two rakaats sunnah with the multiple intention of it being Tahiyyatul musjid as well?

Q: If one misses the sunnat salaah of fajr, then should he join the Imaam in jamaat and leave out the sunnats?

Q: I have two questions I want you to help me with. May Allah Ta'ala grant you the ability.

1. I want to know how to perform istighfaar Salaah with full details.

2. And also, are there any particular Surahs to be recited or any particular prayers to be performed for one to get married soon? They have been searching for a good groom for me for the past one year but nothing is become finalized and is failing for some reason or other. I don't know why but Allah knows best.

Q: How do you make the niyyat and pray the prayer of repentance. I have heard you make wudhu and pray two nafil. But what do you say in the niyyat exactly and is there anything special you say after the namaaz? Also can you make wudu for Esha namaaz, pray the repentance namaaz and then pray isha right after with the same wudhu?