1995 Toyota Camry Black smoke comes out of the tailpipe

Hi! my 95 toyota camry has Black smoke comes out of the tailpipe when I push the gas.

and the idle is below 1 and the engine keeps making sound like Bak Bak Bak at the tailpipe and also the oil turns black after a week or less, and i did a compression test and all cylinder were like 185 PSi and one of the spark plugs has oil on it and all them were black and burnt and the red Arrow on the picture there like three hoses when i pulled them out the idle goes back to 1 rpm and when i put them back the idle gets missed up and drops to near 0 and i belive one of those hoses come from a thing like a sensor or some electronic unit and the one other hose comes from the Brake booster. So Please Any help would really be appreciat it