got a leak

[SINister]

no honestly as soon as i seen that i have not done anything. im guessing i would have to run the engine now to get something to leak and then check?

[SINister]

am i right to assume that green/yellow liquid would be part of the coolant?
and if it is a coolant leak and its not like big puddles under the car its still ok to drive short distances correct?
also the coolant reservoir thats on the passanger side wheel well how far should that be filled? i see hot and cold lines on it and dont wana put a bunch of coolant in there if its only supposed to be filled so high or something.

hope these are not dumb questions haha just dont know anything about these cars and i have searched but cant find what im looking for