i guess its ur first car. 98k on odo does'nt mean that its the real mileage, it might be 198k. Anyways front end rattling is common problem in cultus, if steering is already repaired then i m afraid there is not much room for improvement but do get its steering column checked from expert. change it with eps if required. Replace Control arm/chimta bushing
Check all 4 wheels bearing, brake pads and get wheels balanced and align
Replace rear springs
Get it cleaned including engine bay from service station.
New front shocks pair kyb japan 5500
Rear springs ~ 1500-2000
All steering and axle bush~1000