On these questions see the following:
"...the same wonder-working power of the Spirit which made a lame man walk in the preceding section has enabled a man named Barnabas to sell his field and to give the proceeds to the apostles, who made distribution of such gifts to those in need (cf. Deut. 15:4-5)....The power which broke the bonds of death on Easter, shattered the divisions of speech at Pentecost, and empowered one who was lame now releases the tight grip of private property."
"The sharing of material blessings among believers is portrayed as a particular sign of the grace of God at work in the community."