I have both style of filters.. an HKS-style foam filter, and a K&N-style cone filter. The foam filter is awesome if you're at the track and stuff, as it increases the air flow a lot more than the K&N cones, and the sound made by the intake.. *boing!*

but that's all they're good for.. I would suggest you use a K&N-style cone filter for everyday driving, your engine will be safer and cleaner.
As for the Universal adapter, all you need is an AFM adapter bracket for Toyota, remove the air box and then bolt the adapter and you can now add a filter to your car... remember, you cannot remove the AFM from the intake, or your car won't run properly.