№ 1. It is emperor Arcadius or his brother Honorius. But my guess: Honorius. Help! I need somebody help!
Number 1 is hard to see, but I would lean towards Arcadius from the letters I can make out. Bigger pic would help. Number 2 is Faustina II, Fortuna reverse. Number 3 is either Jovian or Valentinian I from the Sirmium mint. You would have to be able to make out the letters on the left side since they both have the legend break ANVS PF AVG.
It can't be Heraclea because there are 5 letters in the mintmark. It looks more like SMAQ(?), so Aquileia
It is Theodosius and odds-on bet is that no. 6 is Constantius II. On the VOT V coin I would presume Jovian, I have an identical example in my collection.
There are members of this forum who are far more knowledgeable than I when it comes to attributing late period Roman coins and I'm sure they will offer opinions soon. On a subject related to your avatar—here’s a superb public domain image of Peter the Great.
№ 7. Hello gentlemen. I got this tetradrachma of emperor Gaius Messius Quintus Traianus Decius (249-251) today. Please tell me what is the Mint? My guess - Antioch on Orontes.