Let's seeee....hmmm...
Elves - I believe the shining blond-haired with violet eyes "Fairies", as Gygax first refers to them in the MM, is based from Galadriel, and Elrond references them -at least in the films as far as I recall though don't remember if it's in the books- as his "kin").
Almost certainly not, considering that descriptions of elven or elfin beauty most definitely predate Tolkien; not to mention that Galadriel is never described as having violet eyes.
Orcs -as the original green pig-faced orcs are taken directly from the images of the Brothers Hildbrandt and those are directly from Tolkien.
The green skin / pig-face / tusks image of orcs is distinctly non-Tolkien. Tolkien consistently describes his orcs as slant-eyed, flat-nosed, dark-skinned, and frequently stooped.
Not remotely - present in mythology, assorted pulp fiction in decades preceding Tolkien, and occasionally Cthulhu mythos.
One example.
Another.
Giant/intelligent/speaking Eagles.
Giant and occasionally intelligent birds or bird-like creatures have a widespread mythological basis. In addition to the Roc, there's the Simurg, Aquila - Zeus' servitor (which specifically is an eagle), Odin's ravens, amongst many others. Almost certainly present in lost-world pulp serials as well.
Giant/Evil/intelligent Wolves a.k.a. Worgs or Wargs.
Ever hear of Fenrir? Wargs are taken directly from norse mythology.
Wraiths - totally forgot the Wraiths.
Laughable if you know anything about mythology and folklore.
Wights - arguable, but inclusion of the Barrow Wight, like the Ringwraiths, even if wights & wraiths themselves have other folklore and myth behind them, Tolkien's Wight being found in a barrow (burial mound/chambers) and having a corporeal nature (unlike the wraiths) is his own.
This one probably is Tolkien, although the word is not. The life-draining is pure D&D, however.
Items & Places:
Ring of Invisibility
Wrong. Plenty of mythological basis.
Here's one example.
Nope. Long-term presence of crystal balls in folklore; and they made their way into Victorian spiritualism.
I don't explicitly have a reference, but I doubt it. Pre-Tolkien elves were frequently associated with magical items in fairy tales and other stories. And magical cloaks or boots are hardly uncommon.
Weapons that do more damage/special powers against specific foes: While magic swords in fantasy myth and literature are hardly unique to Tolkien, the idea of Sting, Orcrist, Glamdring, -as magic swords that were made to kill goblins & orcs and, so, by extension the swords with extra damage vs. lycanthropes or magic-users, etc... is specifically Tolkien.
Doubtful considering how widespread magic weapons were in mythology and pulp sword-and-sorcery tales. The concept of supernatural creatures that can only be defeated by or are vulnerable to special weapons predates Tolkien by many centuries.
Arguably various wizard/mage staffs.
Dates back at least to the Egyptians.
Wizard Towers- While not a definite, I may be stretching, but the concept of Wizards in/building/using Towers as their strongholds (in Basic/BECM) from Orthanc.
Nope
The very concept of the Dungeon Crawl & Wilderness Adventure are straight out of The Hobbit and LotR
I'm going to guess you haven't read much (or any) Conan?
Nothing personal, guy. These misconceptions and delusions are pretty widespread.