Problem: I would like to set up a conditional that tests the time of the most recent post edit. If the most recent edit was less than 5 minutes ago, I would like to show some content.

Solution: Use the wpv-post-date shortcode to output a Unix timestamp, subtract that value from NOW(), and compare that value against the number of seconds in 5 minutes (300) using the following syntax:

[wpv-conditional if="( (NOW() - [wpv-post-date type="modified" format="U"] ) lt 300 )"]
...the most recent edit was less than 5 minutes ago...
[/wpv-conditional]

Relevant Documentation:
https://toolset.com/course-lesson/using-toolset-conditional-block/
https://toolset.com/documentation/programmer-reference/forms/cred-conditional-display-engine/
https://toolset.com/documentation/programmer-reference/views/views-shortcodes/#vf-154574

Problem:

I'm utilizing a repeater field to capture the years of each particular model of car. I can easily retrieve the first index with the following:

[types field='vehicle-year' index='0' separator=', '][/types]

My question is how do I retrieve the LAST index item of any particular car?

Solution:

There isn't such kind of built-in feature, you might consider custom codes, for example:

https://toolset.com/forums/topic/get-the-last-index-of-a-repeating-field/#post-2020227

Relevant Documentation: