i was wondering what to do with hands like 3456X and 4567X do you play these hands and how many do you draw if you do?

Fold and fold unless HU(not ring game) for snow and meta game reasons.

3456 is usually played as 345, 4567 ans 457 FWIW.

Read Negreanu's chapter in Super System 2; he'll set you straight.

Maybe I'm dumb but I play 'em. Many hands are heads up before the first draw. If I'm the aggressor, I usually draw to these 4 and hope opponent folds. They fold more often during the hand when you are drawing less cards. I'm OK with everyone telling me the flaws in this thinking. I probably draw to 9's more often than most people too since I took a crash course in this game at the high limit, often shorter than 6 handed tables. Most of the time I was heads up before the last draw and it seemed to work fine to draw to 9735 on the second or third draw, though on the first draw dropping 9 here seems better. Daniel's Supersystem chapter is a fabulous to the point crash course.