How to pronounce the three of them? présent? or prsént? the present (noun) present (adj) to present (verb)
The present (noun) and present (adj) are both pronounced "présnt".
To present (verb) is pronounced "prsént".
I hope this helps! In future, you can check pronunciation of words at http://oald8.oxfordlearnersdictionaries.com/dictionary/pronunciation or www.thefreedictionary.com - although I don't know if you could find fine distinctions such as the ones in your question.
Thank you for your very helpful links! have a nice weekend!