Clutch problems cannot shift into gear when car is idling in neutral

In short I think you nailed it with it needing a clutch as these are all clear signs that the clutch is not fully disengaging which means you slave cylinder/throw out bearing are not releasing the clutch.

Here are a number of guides that talk about this in more detail and how to repair it:

https://www.2carpros.com/articles/clutch-doesnt-work-sometimes-or-not-at-all

https://www.2carpros.com/articles/clutch-symptoms

https://www.2carpros.com/articles/how-to-replace-a-clutch

https://www.2carpros.com/articles/throw-out-bearing-replacement

https://www.youtube.com/watch?v=EpBMj5ZY_bo&pp=sAQA

We are going to have to rely on these guides and this video as the manual does not provide much detail at all on how to do this:

https://www.youtube.com/watch?v=6N6b5F2ChyE&pp=sAQA

Please see below for this info and the part numbers for most of all you will need to replace.

Please let us know if you have questions on this.

Thanks