I am not trying to re-post the same stuff. Who can tell me what happened?

I was getting a new intake gasket put in and on the test ride they told me they think I was missing a brake pad in the back and had no fluid??. Before anything, I bought new pads and went from there. I popped wheel off drivers side and changed out pads no problem other than those metal clips which never seem to take my pads right(any advice?), rotors looked fine, caliper did look dry, if that matters.
I proceeded to the passengers side, the bad one. I popped the wheel off, saw i had no pad and a mess in there. I loosened and lightly tapped the caliper off, which must have had the piston pushing against the rotor, correct? (not too car suavy) The piston practically shot out at me with some fluid, but not much. I replaced the caliper but something is wrong. Cylinder is still full.
The caliper I replaced is dragging. I tried to bleed the brakes after changing caliper but nothing came out, like nothing happened. Just drags and burn now if I drive it, which I cannot.

Can someone please help. I am sure someone here knows what could be going on. Being unemployed sucks. I have put so much in my Blazer in the last month alone. I love her but am starting to doubt the feeling is mutual. My daughter is sick and contagious, I cannot bring truck somewhere to get looked at. My jack broke yesterday when i was gonna check out lines. Help

 

And yet you are reposting the same problem. I have combined your two previous threads on this subject and anybody who wishes to respond to them can do so here.