Q: Can't connect new iPhone 6 to the Bluetooth in my 2010 Toyota Sequoia.

Hi, Jnsarbuckle.  

Thank you for visiting Apple Support Communities.

The usual cause for this would be that you simply need to place your Bluetooth devices in pairing mode and connect them to your new handset.  However, here are a couple articles that have some helpful troubleshooting steps regarding Bluetooth connectivity and an iOS device.

Get help using your iPhone, iPad, or iPod touch with your car stereo

http://support.apple.com/en-us/HT203412

iOS: Troubleshooting Bluetooth connections

http://support.apple.com/kb/TS4562

Cheers,

Jason H.