Toyota Camry blue smoke problem!! help?

[Casey G]

I have a 94' toyota camry V6 le about 3 weeks ago i added a fuel injector cleaner also octane booster with it at the same time! (i know stupid, ha?) i did fill up the tank..The day after i changed the spark plugs and did an oil change about 2 days later i noticed some blue smoke come out of the tail pipe and it started to get worse every time i would turn on the car every morning the cloud of smoke would get really big and every time i make a full stop and accelerate the smoke comes out again (very noticeable). It's been three weeks and i've filled up the tank about 3 times and it still blows blue smoke out the tail pipe, But, not that bad like the first days. also there is an oil leak and i already changed the valve cover gasket and there seems to be a raddling noise around 1500 rpm but after 2000 rpm it goes away and sounds normal. Before i did all this my car had just passed smog. so my question is, what's could the raddling noise be? and when will the smoke go away? maybe i have to replace something like the piston rings or something like that? also there has been a lack of power at the acceleration and it has been guzzling my gas lately please help!!