Hello and welcome.
Sad to say, but most of these appear to be replicas. I've given them arbitrary numbers, to help with identifying them.
#1: this is a commonly seen replica; we've spotted them on the forum a dozen times or more.
#2: appears to be genuine.
#3: This isn't Spanish, but is actually a replica of a Crusader-era coin from Cyprus.
#4: Replica, sorry. Probably not real gold.
#5: It appears to be a Reyes Catolicos early Spanish real. Replicas are common; we'd need to see close-up pics of this one.
#6: I can;t tell if it's a cast fake, or corrosion from a shipwreck. I suspect cast, but I'd need to see the edge.
#7: appears to be genuine.
#8: this one is actually a replica of an English sixpence. That deep scratch next to the shield is probably where someone has carved away the "WRL" replica-mark.
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