go for petrol. if you go with diesel than the maintainence cost and the difference between petrol fabia and diesel fabia will be more than petrol fabia and the most important thing if you go for diesel than you are in loss because the difference amount between petrol and diesel will be around 150000 whose interset is(12%) 18000 that you will pay to bank and that will take you 8 years to make up the difference between petrol and diesel.if you travel more than 100 kilometres in a day than better go with diesel or else don't buy diesel, because petrol cars have negligible maintainence cost but diesel cars have a lot of maintainence cost like air filter, mbile filter and diesel filter and the the not forgetable part if a single drop of water comes in your diesel cars tank (anyhow) than that will cost you atleast 15000-20000 for repairing diesel pump.so go for petrol.
If your car were parked correctly then it will need lesser effort but if you parked without taking precautions than it needs a loads of efforts. First if you haven't disconnected the battery, your battery will be discharged for sure, it might also harm electricals of the car. We will also suggest you to check the wirings, that it is not damaged and cut. If you haven't put it on jack stand, the tyres are now useless, you will need to replace all four tyres. The engine oil need to be changed even before you fire the engine, as the older engine oil might have bigger particles at bottom, which can damage the engine. Apart from this a general servicing, new coolant, brake shoes, brake and transmission fluid and general servicing will make your car road ready again.