If you don't have the original documents, you can get a few pages from the application file on HeritageQuest, which most libraries subscribe to; some have web sites with a link to the site, some have arranged for you to log in using a library card number or driver's license number.
The complete application file is available at www.footnote.com
, which has a free trial plan, or you can subscribe.
Sometimes the files give some genealogical information, sometimes not. They almost never mention siblings or parents.
The NJ Archives in Trenton will not do your research for you. The offices in the Burlington County Courthouse also will not do your research for you.
If you want to go through the documents available, you must go there yourself or hire a knowledgeable researcher, preferably a certified genealogist.