it can damage your car. your gas tank is just a tank with gas, it's kind of hard to damage it.
Yes, it may block the carburetor and trash the catalyst.
there isn't one you mix the gas and oil in the gas tank(make sure you have 2 stroke oil).
it depends if its a older bike you may have to put premix in (mix of oil and gas) in the tank if its a newer bike it will have oil injection and you only have to put oil in the oil tank and it mixes with gas in the carb, in any case try to get a manual for the bike in question it will tell you what to do
damage engine no.. will the engine run no.
because oil is refined into gas
Some truckers use the oil from an oil change as added fuel in the tank. In this case it will Not ruin your tank
If you mix the oil and gas together in the proper mix and do not add oil to the oil resivoir you will be fine.
Under seat the back black tank is for gas. The white tank in the front of the black tank is the 2 cycle oil.
I don't believe any amount of oil in the gas would do 'serious damage', - it would possibly plug up your fuel pump and definitely plug up the carb or injectors, but the engine would die of fuel starvation before 'serious damage' happened.
Anything other than gasoline
If its an oil injected motor there is a tank that holds the mixing oil if its just a straight carburated motor the oil mixes with the gas in a can then put it in the gas tank.
That depends on the amount of oil in the gas tank. Most the time, if the amount is quite a bit, then you may have to replace your gas tank completely because oil can cause future problems with your fuel filter and even your pistons. ~ Proud Mechanic.!