The "dragon speaking" are called shouts which you can access from the same screen you choose your weapons from. Depending on what gaming system you use, you either click either the left or right bumpers.
a necklaces, you can only have one on at a time
sadly, no
No. Dragonborn needs Skyrim to run
NO...
Red dragons do not exist in Skyrim. There are green, brown, bronze, white, and the end game boss Black dragon.
You can play as a dragon Burning Skies - Flyable Dragon Races 3 mod by ElSte17 and UbuntuFreakDragon on the Skyrim Nexus. If you just want to fly, you can ride dragons in the Dragonborn DLC.
A dragon found at the Throat of the World in Skyrim.
Any level really. If you speak to the Jarl of Whiterun and visit the watchtower, a dragon will appear, you can do this at Lv1 if you want. From this point onwards, random dragon attacks will happen all over the game world.
The closest you get is a shout which can summon a dragon who has allied with you, this happens during the main quest.
There is no Dragon Priest Armor, only their masks.
the dragon priests wear em'
you have to make it yourself