While buying a used car, it is always recommended to buy the newest, best-maintained example that falls within your budget. Keeping your usage in mind, you could consider a fuel efficient petrol or diesel, in order to keep a check on running costs.
For Rs 4.5 lakhs, there are multiple body styles, transmission options, engines, etc., which you can consider, and without knowing your requirements, it'll be hard to recommend the right options.
You may look at reputed used car portals like Spinny for complete peace of mind while buying a used car.
