Joe is correct for how to get the total number of words, so you should be set.
You should use the INFER command to get your other results. You just need to configure it properly in the dialog (shown when you add the command):
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If you want identical order, you need to check the 'Use advanced settings' dialog and set 'Source words ignored' and 'Destination words added' both to zero - you want exact matches.
If you want any order, leave those two options at zero, as it seems like you don't want any extra words, but also check the box 'Ignore word order'.
To determine identical form or not, just toggle your choice of Lemmas or Words. Doing Words will give you identical form, doing Lemmas will give you identical or non identical form.
Its a bit more tricky to get only different forms. You want to basically exclude your inflected hits from your lemma hits. I'm not sure if there's a better way to do this, but what I came up with was using the CONTENTS command. Run both searches, inflected and lemma, and then do a CONTENTS command to find the hit verses for lemma that didn't match inflected - a.k.a. the different form results. The only downside of this is you may miss a hit in a verse where one phrase is identical and another isn't.
Here's a workspace showing this setup. GNT28-T 4 has your final results set for different forms.
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Of course, to calculate all of your variations, there are more searches to be run, but this should get you started!
Let me know if you have any questions or thoughts - or if anyone thinks of a better way to get the different forms only.