Of course we couldn't!
I don't think I could survive without the coffee machine at Uni during late night study session and classes XD
realistically, we could, anyone could. If we ignore medical technologies (for now), most of the technology today is just here to make our lives more comfortable and easy going. It would be difficult at first (in the short term) especially if it was something all of a sudden and not gradual. If we had no car or mode of transport how would all the food get around? We could have potentially mass starvation, those living in urban areas would have the space to grow there own food ( and with today's society they would be stealing, plundering murdering for who knows what..). Gosh, I wonder if some of them would even have the know how to ( considering to some kids today - milk comes from the shop - not the poor cow XD).
Now, I'm guessing people will die due to no medical technology being available, but we still have out knowledge so doctors might be able to do some surgery on make shift things.
So I think in the short term (depending if it was gradual or sudden) it might be a bit chaotic, but in the long term, I think we could survive, we did so for humdreds of years before the industrial age.
(wow, I didn't think I'd write so much XD)