you need to go to this webpage http://welcome.solutions.brother.com/bsc/public/us/us_ot/en/doc/manual_index.html?reg=us&c=us_ot&lang=en&prod=hf_xl5130eus&dlid=&flang=English&type2=-1
and download the instruction manual for this model. It has the threading up instructions plus selecting stitches, winding a bobbin etc.
The thread breaking is most likely due to incorrect threading up of the top thread. I suggest that if you can, you print out the manual, put into a little folder and place beside the machine and refer to it often. Follow the instructions in it on winding a bobbin, putting it into the bobbin case correctly and threading up the top thread. Make sure the bobbin goes into the case the correct way, as per image.
Remember, ALWAYS THREAD UP TOP THREAD WITH THE PRESSURE FOOT RAISED, this keeps the tension discs open so the thread can seat into the tension device correctly. And you must get the bobbin thread into the tension spring fully and then place the bobbin case into the shuttle using the little latch so it stays in place.
Also, new needle for every new project, and put the needle in "flat shank to the back". It will take standard domestic sewing machine needles 705/130H but it is important to select the correct sized needle for the fabric you are sewing so that the needle can penetrate the fabric but not leave big holes. So for light weights like chiffon you want a size 60 or 70. For medium weights a size 80 and for heavy fabric like denim or a coat weight wool you would use size 100. Ball points for stretch fabrics so that the needle pushes between the fibres and a regular point for woven fabrics.
I trust this helps you out, 4 thumbs up if so. Thank you.