We have these topics all the time, but it's usually a more general question about the lifespans of all races.
The Khajiit would be difficult to answer. I don't believe there are any sources at all that give a firm answer about their lifespans. They were possibly once Elves who were changed by Azura's gifts. Then again so were Orcs once Elves, who were cursed and deceived. Their lifespans became much shorter when becoming Orcs. Would the same hold true of Khajiit? Does anybody know? Do we have any references at all?
Bosmer are said by the Altmer to have muddied their bloodlines with "Mannish wives" but also to have a lot of Ayleid blood in their dynasties. I'd say they're somewhere between humans and Altmer.
(I'd say the average Human lifespan is 65 to 80 whereas the average Altmer lifespan is 200 give or take. Magic and nobility increase men's by a few decades and Altmer dramatically, sometimes to 1000 years or more.)
I'm comfortable placing Bosmeri lifespan at 120 to 140 years. That's liberal. They may have shorter lifespans due to their more feral society but I don't feel it's an outrageous number for them considering their Aldmeri bloodlines.