The ones that I have listed have a lot of service life left in them, even the Jaguars. 37 of them were newly built and are just a few years old.
More teeth for jaguar: Nearly 120 of the Indian Air Force jets are being modernised | Mail Online
The Jaguars are supposed to get a new engine by 2023. They should be good to go until 2030-35.
The Mig-29s and Mirage-2000s are also undergoing upgrades today, so they will be good until 2030. The last upgraded Mig-29 will be delivered in 2016 and the last M-2000 in 2021. I suppose FGFA will start replacing the Mig-29 after 2025.
The Mig-21s have very little life. The phaseout process has started with the FL version already being phased out. We have three other versions called M/MF, Bis and Bison. By 2020 we should see the majority of them gone with Bisons being the last to go. The same with Mig-27s. They may go out earlier than thought because they are not getting the planned EW upgrade.
I don't know how to answer this because there is no specific answer. Europe, being far richer, have a more consolidated force and UK's and France's in particular are meant for expeditionary roles in support of the USAF/USN. It means UK/France are going to work with the US. So, the type of weapons, training etc is all meant for this. IAF is not such a force. Even with greater numbers and bases, we cannot work together with the US in such roles because we don't use the same communication devices. Even after we get the Rafale, I doubt we will even be able to work with the French because communications links will be different. Even the way we operate is different. IAF is meant to fight enemies across our borders, not the case with UK, France or Germany.
If you look at a 1v1 comparison, then IAF has greater number of aircraft, personnel and bases than either UK, France or Germany. None of the countries have anywhere near the numbers necessary to fight the IAF. But IAF is currently using equipment that is much older in comparison, which balances things out. Like I said earlier, in 5 years we would have caught up, beyond that IAF will give all European countries a one-sided drubbing.
Saudi Arabia is a pretty dog at a dog show. They don't buy aircraft based on operational necessities, they buy it for political needs.
Israelis are a worthy match to us. Better in some aspects too. They have a better industry supporting them. But in 5 or 10 years they shouldn't be anywhere near us, some of the credit will go to their industrial support to our air force which is happening as we speak in the department of EW. We have some real good programs with them and they are bearing fruit today.
The Chinese have just started getting ahead. Rafale will keep us on par but they already outspend us. I don't know where the Chinese plan to stop, but it may not be comfortable for us in the long run unless we match their level of spending. We have better aircraft deployed today, but they are catching up real fast. Lucky for us they have other air forces to worry about.
All air forces structure their strength for a particular need and budget. So, just comparing numbers and stuff is actually useless. The Israelis are best suited for their environment, and the Chinese for theirs. The same with the others, except Saudi Arabia. We would like to have been better off but it hasn't happened until today. Let's see how things are in the future. We are getting a dedicated naval air wing as well. In 15 years it should be more powerful than any individual European power.