Hello Tom Geldner !

1) No, full name is used completely. So you may change the title of full name to "Frist" via the Polyglot app and add the new field like "Last", but make it searchable via according to this manual https://github.com/unaio/una/wiki/Search-Forms

2) It's the input data from the own form (See it in the Forms->Persons area).

3) By default, the Protean template app is the only available. But you may work with your own mixes likes described here https://github.com/unaio/una/wiki/Protean

4) No, with the proper setup payment method it is changed automatically.