OK so I just bought a 06 S40 with 136K has dealer service records up to 84K. The car runs and drives very nice but I would like to do some general maintenance like changing the oil, the plugs and transmission fluid and air filter to start.
Can someone provide the right information here?

• Oil Mobile 1 5W 30 7 quarts
• Spark plugs dont know yet? Please tell me
• Tranny Fluid Mobile 3099?
• Air filter what part number?

Thanks if someone who is familiar with what I need for this could send me the info I would be greatfull