Faculty of Law, Banaras Hindu University

For 2020, there is no as such admission forms details given by the official you have to wait for December or January 2020.

B.Com (Hons) is a more detailed analysis of the topics whereas B.Com is a bit simpler as compared to B.Com (Hons) as there is not much detailing and the subjects are easier. If you have high marks in 12th you can take up hons but maths as a subject until 12th is compulsory for honors otherwise you can take simple B.Com.

There is no prescribed BHU-UET 2019 syllabus. However, based on previous years BHU UET sample papers, Shiksha has compiled a list of topics that candidates can prepare in order to perform well.
Link: https://www.shiksha.com/university/bhu-banaras-hindu-university/bhu-uet-exam-syllabus

BHU is not providing distance education and don't have the policy about this. You have to attend your classes as a regular student. On the ground of your job and locality, BHU administration may not allow.