For radiator issue. Get the radiator flushed and serviced if the radiator too old then get it changed. Also get the head gasket checked cause it can cause air in the cooling system. Get waterbody checked.
Plus use coolent instead of water.
Get the car aligned and tyre checked. Go to the alignment shop.
For pani from silencer first tell if the engine is decreasing engine oil or giving white smoke or black.
Get the car compound and polished. My painter charges me 2k for polishing and the car looked amazing.
Use sun shades and avoid black tint cause cops and warden.