Toyota Vitz 2005 1.3L Auto Air Filter

[technoguy]

Hi all, I am a new member and this is my first post. I have a Toyota Vitz 1.3L Auto 2005, it is exactly same as Yaris, japanese import. It has done 30000kms and I just got Oil and Filter replaced with Castrol Magnatec 10w-40 and RYCO oil filter. I want to know if I need to replace the air filter as well and if there is anything else I need to check. I am unable to find transmission and power steering oil level as not sure where to look. Just under the bonnet, in the centre, I was able to locate the air filter and the part number is Denso 17801-23030. Would like to know if it needs to be replaced, looks ok though and which filter to get. Is there any other filter behind the glove box?

Sorry for so many questions but I am a newbie. Also, need to know if clip on type wipers can be fit as wiper blades need replacing.
Sorry, another thing, need to put a FM band expander too but need assistance.
Thanks