It's as easy as a cassette tape adapter.
Maybe 6-8 bucks, lol... Not the stealthiest thing. But it works....
Wife loves hers. But not BT compatible though.
https://www.amazon.com/INSTEN-Unive...7749917&sr=8-1&keywords=cassette+tape+adapter
I do miss the BT connectivity I had in my 2015 Tacoma though. It just worked great and with steering wheel controls to both audio and phone. Made driving easier and doing business.
Now I have had an iPod adapter from Lexus in the past on an older LS400 and it wasn't that cheap but I scored it on eBay after researching exactly which part number I needed and it plugs in and pigtails off the audio harness behind the radio in the dash and left me the wide iPod connector sitting in the glove box. I do know certain newer years had iPod controls in the factory audio unit that made this possible.
Good luck finding what works for ya, I wasn't trying to be smart with the cassette adapter. I think they are an eye sore but can work in a pinch if needed.
Oh one other thing, I have found that the wife much prefers to use my iPod Classic as it's an 80GB with all 50+ gigs of my music on it.
SO that means the second most important input in our vehicle is a 3.5mm headset port.
MOST important is a charging port! She can scroll though and look at everything much easier on the iPod Classic than trying to get whatever audio system your using to try and process 50+ GBs of info and display it. Hope that makes sense.
It's also much easier while the driver is focused on the road your passenger isn't trying to fumble and navigate the dash while hanging on. She just simply uses that amazing "opposable thumb" and enjoys it. My 2015 Tacoma just couldn't process all that info quickly, I did't think it would so I put my favorite music in "Playlists" to make it easier on the factory head unit.