qadha salaah

Q: I am currently updating my will, I need to know the following:

1. What is the Rand value for each qadha salaah?

2. What is the Rand value for each qadha roza?

Q: I want to know when can we offer Maghrib prayer if we miss it while traveling back to home from the office? Can we offer it with Esha prayer??

Q: I want to know qaza times for all 5 times salaah. What is the duration of time for qaza for each salaah?

Q: I want to know what should I do if I miss a prayer in traveling? For example, the Zuher prayer is offered from 1 t 2 PM but when I reach home its already 4 PM. So what should I do in such a situation? Should I perform the complete Zuher prayer at 4 PM or only offer the farz (obligatory prayer)? 

Q: Please confirm if the following way is correct or not? If one has a lot of Qada to complete, then one must perform them quickly. One may recite Subhaan-Allah (سبحان الله) 3 times instead of Sura Fateha only in the empty Rakaats (the third and fourth Rakaats in 4 Rakaat Fard (i.e.Zohr, Asr and Esha) or the third Rakaat in 3 Rakaat Salaah (Maghrib). There is no harm if one reads one Tasbeeh instead of three in the Ruku and Sojood. The Fard will be completed. One may read this Darood Shareef (Salawaat) اللهم صل على سيّدنا محمد و آله in Tashahud instead of the complete Darood-e-Ibraheem. In Witr, read رب اغفري once instead of the complete Du’a-e-Qonoot.

Q: I do not know how many qadha salaah I need to make. Does moulana have any method to then actually read those qadha salaah

Q: When we miss a namaaz and pray qaza. Like say Fajr qaza, the duas I usually pray after fajr and after every namaaz, should I pray these duas? Are they counted or does it not matter if I pray them or not?