Brake problems
 

I have a 2000 montero sport. My brake light was on and brakes were grinding. I had the brake pads replaced on the front and the braqke pedal went to the floor and the brakes are gone. I assumed maybe air in the lines so bled them. They will not bleed. I have since replaced all brake lines on passenger front side and pads on driver. Calipers on the back n brake pads. The pedal was not like that until the brake pads were changed. I have spent almost $400 and I am so frustrated. I took it to a shop n they are unable to bleed the two front calipers. also said that it appears someone has put sumthing in the brake reservoir that isnt brake fluid (orange)..any suggestions? I am so frustrated!

sooooo...nobody has any suggestions? Master cylinder maybe? What would cause the two fronts not to bleed and my brake pedal to go to the floor? I truly am stumped. The mechanic cant even tell me what is exactly the problem. Any advice would be appreciated..