How can i get a title????

you could also go to a tag place and have them do a title search if you are sure it was titled in NJ, if you are lucky you may be able to find the previous owner and convince them to go stand in line at the NJ DMV and get a duplicate title, (I usually offer the previous owner $50 or $100 for their time and trouble)
or you could try here http://www.broadwaytitle.com/