Does your Bachelors' Degree really matter? Can you basically major in anything and study your dream job as a Masters' Degree?

I have a question for you.....do you ~ really ~ want to attend college?  Sounds to me like you don't.

Not necessarily.  Depending on the area, you might be rejected if your Bachelor's has nothing to do with what you want to study for your Master's degree.  Someone with a liberal arts degree is not likely to be high on the list when applying for a Master's degree in the Sciences/Engineering, for example.

Sticky Notes -- ALL Master's programs require you to have a Bachelor's degree.

Yes, to some and extent, and no, to some extent.  ALL master degree and other graduate programs have admission requires and prerequisites. Those tend to be specific courses rather than a major, so, for example, you could major in Philosophy or Chemistry and still get into either law school or medical school depending on the courses you take.  The same is true for a master's in counseling or engineering.  You might not need a BA in psychology or BS in engineering, to get in, but it is very likely that the course work required would be what most students majoring in the respective subject would take.

There are some jobs that are tied directly to a specific degree, but there are hundreds of other jobs that are not. A degree of any kind is not a guarantee of employment or a career.  

It depends on what you want to do with a masters degree. Some masters degree programs require you to have already completed your bachelors. Most stem programs are this way.

Your masters degree can be in a field unrelated to your bachelor's.  However, your masters program may require certain undergraduate prerequisite courses.  Also, you may find your fellow masters degree students may be much better prepared than you if their bachelors studies were in a similar field but yours were not.

Depends on the Masters. 

No.  If I were a college admissions counselor and someone told me that they would promptly be rejected since they obviously don't have any clear goals or direction in life.  Might as well major in Women's Studies and expect to come out of it with a job making 6 figures as the CEO of General Motors.

Master's degree programs are all going to have certain admissions requirements.  Some may require that you have a bachelor's degree in a particular field, while others may just require that you have taken certain classes in the field.  

The Master degree program you choose  can have prerequisite class you need to   take as an undergrad.