Umm. I'm buying a new Squier Strat,and i wonder how long would i use,or how long will this guitar could last without set-ups?
as much as you take care of it
A fairly long time if you treat it right, but you'll probably want to get a new one before the Squier breaks.
Ages. Just learn how to set it up yourself.
2 days dum dum dum nah long time all guitars last A VERY VERY LONG TIME