"used to" and "such a" versus "so"

"Used to" expresses the action happened at past time very regularly.

e.g.

I used to climb hill.(But I have not climbed now ?)(This maybe an error!)

such a + noun("such" is a determiner)

I am such a lazy man so nodody can bear me.

so + adj(adv.)("so" is a adverb.)

I am so lazy that nobody can bear me.

I run so quickly.