Does a concentration matter?

[Ideas]

Would I be able to get into such a graduate program with enough coursework in physics without the specific degree or concentration title but enough coursework credits?

Usually, but they may have to get the department head (or someone else) to review your transcript. There's also a chance they would only offer you conditional admission. It can depend on the competitiveness of the school.

Or, how about if I wanted to be hired as an engineer or another job requiring physics knowledge. with enough physics credits could I possibly apply for the job?

Yes, but sometimes you may get overlooked if your major wasn't physics/engineering. You would definitely need to point out on your resume that you did extensive coursework in the subject area(s).