Calcium scoring is to determine how much disease is present in your coronary arteries, by detecting the amount of calcium contained in the plaque. It only detects hard plaque, not soft vulnerable plaque so only gives half the story really. Your score looks very low.
Everything on your report looks fine, but I have to ask how you got the scarring on the lungs?
Have to be honest here...why haven't you called back?
I am NO expert on reading CTA scans other than having had one recently. If theses were my results they would be telling me that I have minimal calcification, there is plaque building up in some of my coronary vessels and there is some previous lung damage. With that in mind I would be consulting my doctor, increasing my cardiovascular activity and looking at dietary changes.