How do I connect a Samsung HW-H750 soundbar and M-7 speakers to a Pioneer VSX-70 receiver

You have a combination of speakers and receiver none of which is meant to be used together. You could use them together with certain adapters but the net result would not work well.
I would just connect the soundbar to the TV. If you want real surround sound get some passive speakers and an active sub to use with the receiver.

 
I was able to connect the system and have it working quite well. Had to make a few changes on the receiver and tv. I am now able to play sound from tv and receiver.
 


I am curious as to how you went about this. I love my M7 and am looking into getting HW-H750, but am concerned it won't connect with my Sharp Roku TV. How did you do it?

Thanks.