Right, let's see...
#3: I can't really tell what it is, but it looks Imperatorial or early Imperial Roman - and it also appears to be silver-plated around a copper core. If it is indeed early, then it's a counterfeit - possibly of the contemporary type known as a "fouree".
#4: Looks like somebody's been busy with the tin-snips. I think the portrait is of Trajan?
#5: Ferret Lord's guess can't be right, because this is a silver coin. It's clearly a female bust on the obverse, with obverse legend beginning IVLIA. The reverse legend begins with SAECVL.... Putting those two words into the Wildwinds
partial inscription search comes up with only one match for the reverse type (figure standing at an altar):
this one of Julia Maesa.
#6: Smallish bronze coins with a large SC in wreath and Greek inscriptions on the obverse normally come from Antioch, Syria. I can't be sure that's Greek ont he reverse, but Antioch is still my best guess.
#7: This one's too clipped and corroded to be sure about much, but my best guess is Vespasian, Pax seated reverse,
like these ones.
#8: It looks like a
Vespasian denarius, but yours is definitely some kind of counterfeit - the silver has worn away from the high points, showing the copper core. I don't know enough to say whether it's contemporary or modern.
#9: Much the same story as #8, though I think this one's of emperor Hadrian.
#10: Sir F has this one IDed: it is indeed Hadrian. Reverse type Mars walking with military trophy,
much like this one.
#11: Another silver-plated forgery; this one's of Septimus Severus, kind of like
this one.
#12: Obverse is a little blurry, with only legible text "MIVS"; reverse type is female figure holding spear and shield. The best I can come up with here is
this Geta.
#13: This one's also looking a bit coppery, though it dates from a later time, when real coins
were made from silver-washed copper. I can't pick the emperor, but the beard and spiky crown (and severely debased silver) date it to the mid-to-late 200's AD.
#14: Probus, base-silver antoninanus, reverse type someone holding a spear or long sceptre, ...PROBI AVG at the end of the reverse legend. Something not too dissimilar to
this coin.
Whew. There's too many to do at once. I'll be back soon with more guesses.

Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis