bazaars are open until 12 at night, so don’t worry. and they don’t even open until 12 pm, but as soon as they open, there’s traffic. even though the temp’s at 40, it’s the mugginess that will bug you the most. so as soon as you land, get a few lawn shalwar kameez made ASAP. it helps a lot.
as for bringing in stuff, bring in all your essentials that you normally use, in terms of personal and beauty products, as well as something special that you have to have. for example, i always bring a jar of coffee along with me.
prices for clothes vary. you can get a nice suit for around 500 rupees, from say, fortress stadium or Pace markets, or they can get as high as something thousands. again, depends on where you get stuff from. gujjar listed a pretty good list of places to shop at. i would also recommend going to either dupatta gali in liberty market, or kaarigar gali in main market, to see the type of embroidery that is out right now. it gives you a very good idea of what si really in. lahore tends to have a different sense of style than other cities, like karachi or islamabad, so i can’t really give you a good idea of what is in, but if you want to see what some people are getting made in lahore, you can head to Fashion & Beauty or Wedding
what else. umm shoes again, depends on where you buy them from. ECS can cost you starting at 500. the tharra guys can cost you 250. but, tharra shoes can break like…easily…atleast they did for me 
chooriyan are getting expensive! i can’t remember the price that wel right now, but last time i shopped for them, it was like… 100 for a plain set. not very fun. payals if you’re getting silver or gold ones, that will probably depend on the price of silver or gold.