I have the Tundra Grade, but it came with these options:
*Transmission temp gauge (part of tow pkg)
*Color keyed upper and chrome lower fr. bumper with chrome grill surround
*Variable intermittent windshield wipers
*Heated power outside mirrors
*Fr/rear
mudguards
*Cold weather package (heavy duty battery/starter and windshield wiper de-icer grid)
*Tow package
*Different Wheels (aluminum)
*Homelink mirror
*Keyless Entry
If you want a bench seat, and are not too interested in TRD, Moonroof, leather, etc, then save yourself some money and go for the TG. Apples to apples, even with the above options, I saved over $2K from a like equipped SR5.
I bought the CD changer off of a forum member for around $100, if memory serves.
The two things that would have been nice, but that I decided to forgo were the leather steering wheel and bluetooth. Would have needed to go SR5 or above for that.
I was told by a Toyota employee that the TG package was created to compete with the entry level Chevys, and that they have a fair bit less margin on these than the SR5 and of course the Limited. FWIW......