ad.1. according to explorer there is 860,188,643 AC - how many is missing, lost, etc... we don't know, (https://chainz.cryptoid.info/ac/)
       getinfo command is showing: "blocks" : 1669181,
                                              "moneysupply" : 860200134.31513202,

ad.2. there is info on 1st page (May 04, 2014,) :  PoS Specification:     Interest: 100% annually, decreasing gradually to 1% within 3 years - so from May 04 2017 we should be 1% POS inflation only.