na-adjective, noun which may take the genitive case particle 'no'
various; a variety of; all sorts of
Describes a range of different things, people, or situations. Used as a na-adjective or with の to modify nouns.
この店にはいろいろな種類のパンがあります。
This shop has various kinds of bread.
いろいろな国を旅行したいです。
I want to travel to various countries.
adverb, adverb taking the 'to' particle
variously; in various ways
Adverbial use describing actions done in many different ways or with variety. Often used with と.
彼はその問題についていろいろと考えた。
He thought about the problem in various ways.
いろいろとお世話になりました。
Thank you for all your help (in many ways).
noun
Noun usage, often in the pattern 〜のいろいろ to mean 'various things about...' or 'the various aspects of...'. Can also stand alone.
人生のいろいろを経験した。
I experienced various things in life.
今日はいろいろと話したいことがある。
I have various things I want to talk about today.