any info you can get on it, as far as maint records, is a good start..u'll wanna check the air filter, see how when the oil/filter was changed last, tire wear, make sure the suspension is set to ur preference when were the plugs changed out last..those a few things to check out.
as far as brand names, Scotts and K&N are about the best filters you can get, and will more than pay for themselves over time. as far as the type of oil, get the TWF oil gods stirred up at ur own risk! LOL..u'll see what I mean when more of them get online later.