Yes. The adrenal glands are ductless glands.
Yes.
I had done a piece of coursework about the endocrine system and I did find out that the endocrine glands are in fact ductless.
The adrenal glands are endocrine glands. Endo means "in". Exo means "out". So adreanal glands are endocrine glands because the hormones they produce work in the body and not out.