One of the nearby mechanics I showed the car to recommended replacing the oil pan gasket and has quoted around $270 for the same. I'm planning to show it to another mechanic for a quote from him tomorrow but if anyone has an experience of getting the gasket replaced, it will be great to have their experience.

Also, given that I will be getting the oil pan gasket replaced, what other parts can I replace nearby (like seals or front and rear mounts of the engine if need be) without additional labor.

I dont have any idea of the engine related work and hence, it will be helpful to get some idea before giving the car for servicing.

Thanks.

Anyways, if your oil pan is like mine.... don't pay that crapload of money to have them fix it.

Jack up your car, drain your oil, then take out the 8-10 bolts on your pan (however many there are) it should pull off.
clean it up and apply your new gasket. squeeze it out in a steady path all the way around your pan, where the bolts are. the directions say to put the pan back on and finger tighten it. let it sit for an hour before fully tightening it so it sets right.

now i can't really help you if you have some other kind of oil pan

Today I took the car to a mechanic too for inspection and after raising the car, we figured out there are some wet spots near the oil crank seal and on the transmission belt. It appears as if the oil is spreading from there all the way around the pan and near the oil switch. The pulley needs to be taken out according to him to reach the oil crank seal (front) and replace it and he is charging around $150 for that including the replacement.

I'm not sure how much complex it is to replace the transmission belt and just get the pulley out for this price or just do by myself. I'm kind of worried about the pulley part.

Subh.