> I'm interested in learning more about this!
It's very simple, actually.
For strangers, you use the third person and the title « Pan » or « Pani » (Sir or Lady). You avoid pronouns, « The Lady has forgotten the Lady's purse on the table ».
For friends, you use the t-form ("ty", thou), and use a diminutive rather than the full name. « Johny, you've forgotten your bag on the table ».
For work colleagues, you traditionally use « Pan » or « Pani » with the full form of the first name. « Mister John, the mister's bag is on the table ». This is perceived as old-fashioned, and is increasingly being replaced by the t-form.
The v-form has fallen into disuse, as it was promoted by the Communist regime.
(The old-fashioned honorifics still exist, but they are only used in administrative correspondence: the only time when you're "the respectable gentleman" is when you need to pay taxes.)