Saturn SL1 Questions

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Check engine light on got a PO410 code what's wrong g
I have a 2000 Saturn SL1 that has been stalling randomly when I'm at a light. Also when I'm driving on the highway sometimes when I brake it will stay at that RPM and rarely it has even gone higher for a second as if I was revving the engine! I think it has a low idle (hovers around 600 RPM. It had a CEL with the codes P0130 (O2 Sensor Circuit Malfunction Bank 1 Sensor 1.) and P0410 - Secondary Air Injection System Malfunction.

I replaced the O2 sensor and had the light reset. It came back on a few hours later and when I got it checked the same lights were on along with three more:
P0300- random multiple misfire
P0302- Cylinder 2 misfire
P0133- HO2S Slow Response Bank 1 Sensor 1

I replaced the spark plugs, wires, and coils, and reset the light and I still got the codes for the cylinder 2 misfire, and secondary air injection system.

Couple weeks later got it checked again and had the same codes show up but this time it took around two days for the CEL to come back on. This time it only had the secondary air injection code pop up.

One mechanic said my catalytic converter could be clogged. Another said I might not be getting proper compression.
My question is could the cylinder 2 misfire have taken those two weeks to correct itself after I replaced the spark plugs, wires, and coils (which didn’t look all that bad)? Why would the O2 sensor code come up right after replacing it?
Any help would be greatly appreciated. Thanks.
Car at idle runs good but at a stop or take off car bogs n gradually catches speed after 20 mph. Anybody have this problem
the filter pipe has allen fiting can I unscrew it to remove filter without harming motor
My car won't start unless I hold the gas pedal to the floor.
Start it it smokes really bad an when it calling down it would cut off in traffic when I stop at a red light.
My son tried to start the car and he said the key felt like it stuck before it turned. Once he turned it nothing happened, no crank or click, just silence. Further, the radio is not working either. It will start if I hold in the unlock switch on the door and the radio comes on but none of the buttons will do anything. I am guessing its something to do with the anti theft system. Is there a code to reset this thing? and I have heard that there are ways to bypass it all together, is this true? Finally, if I install an after market radio in the car will that cause a problem too?
When I turn the key, the car makes a grinding noise and will not start.
Getting Codes p0301,p1651,1650,p0507. Needs to pass inspection. Is the intake gasket the same as the oil gasket.
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