I just bought a 1996 Lexus ls400 with 227k miles, just ped smog yesterday, is this a good sign?

that the engine is working fine, and how many more miles can I expect out of it with proper maintenance, what items should be looked at right away, it looks like the car wasnt really taken care of as the shocks are gone, the interior is weathered but not torn up and the body is straight, they just painted over the gray bottom and made the whole car white but the white paint doesnt match the cars white paint exactly. Got it for $2300, no accidents and not a salvage title.