2002 suzuki aerio
 

i just bought one and i want it to have change oil, air filter, spark plug etc.. something like tune it up. it has 57K miles already. What are the recommended things i need to check/changed/replaced? what is the recommended oil product and its weight? synthetic or semi-synthetic? what about air filter?

i'm a newbie in maintaining cars, apologies for too many questions.

thanks!
sirjune