1) Very much a possibility. Destroying IAf aircraft in Pathankot, Ambala etc will severely dent India's offensive capabilities. However, IAF Phalcons change the dynamics from 1971. Any PAF aircraft coming in will be detected and IAF will have time to scramble. And most of the PAF aircraft will be bomb laden, with minimal Air-to-air weapons, making life easier for IAF.
Too true, the Phalcons will indeed prove to be a problem, but i believe that the Ra'ad cruise missile can be employed to counter this problem, It can be fired from stand-off range i.e: 350km, this means aircrafts can deliver their load without venturing too deep into hostile airspace.
The ALCM can be used to target Runways or Ground Control tower, anything that will make it difficult for IAF to send their birds up.
2) SAMs will pose a problem, but not an insurmountable one. IAF does use the KH-31 ARM. Plus, Pak doesn't have high altitude SAMs, so IAF can fly above the SAM threat.
If the planes are flying over SAM range then they wouldn't be able to drop their load either, unless they are using precision guided instruments.(To the best of my Knowledge)
3) Again, IAF is numerically superior, so the viability of this strategy is questionable. If a lot of pakistani air craft are coming in, they will be easily detectable, and IAF can scramble more aircraft to intercept them.
Indeed IAF is numerically superior but we have seen from previous conflicts that IAF chooses to save the Best for another day, eg: in 71 the IAF tried their best to keep their Mig 21s as far away from action as possible. So I can guess that the IAF will choose not to send Mig 29s and SU-30s up to often. But this is merely speculation ofcourse......
4) True. The question of leasing J-10s from China comes to mind, but I have no idea whether China will interfere or not, so lets leave that out for now
Even if China chooses not to interfere, we can expect favours from them, such as when they sold us A-5s at throw away prices of 1 million dollars per piece.
5) Iran helped during the Shah's regime. The current Iranian regime is arguably closer to India than Pak. So most likely, Iran will stay neutral. Jordan might help, but depends on whether USa stops them or not.
The Shah was indeed a vehement supporter of Pakistan and relations have indeed remained luke warm since the Islamic Revolution in Iran.
But the two nations are pretty close, Pakistan provided Iran with Centrifuges in 1986 and still supports Iran's right to run a peaceful Nuclear programme. I think though that you are correct here, even if the general population does have sympathy for Pakistan, the govt will refrain from taking sides, they have too many interests in both countries to risk by taking sides........