If I were to say or to say:
we or it should be no more that a few months to get to that? What does it mean when someone says a few months or no more than a few months past a year to investigate?
If I'm getting the meaning right, then it should read "It should take no more than a few months to get to that". This means that the person envisages that it will take perhaps 4 to 6 months to reach a certain stage. "A few" does not necessarily mean 4 to 6 but in this case, that would be how I would read it.
As far as the second part is concerned, it should read "....a few months longer than a year to investigate" or ".....a year, plus perhaps a few more months, to investigate". Meaning perhaps 13-16 months.