Q: Mike, is this schedule 'overtraining?'
Monday: Bench press 4x10 Incline 4x10 flyes 3x5. Pushdowns 4x10 1-hand extensions 4x10. deadlifts 4x10(last=failure) rows 4x10 other back thing forgot what its called 4x10.
Tuesday: Squats 4x10(last set=failure) leg press calf extensions 4x15-20 seated calf raises 4x15-20 Leg extensions 4x10 Rev. leg extensions 4x10 barbell curls 4x10(last set-failure) hammers 4x10(last set -=failure)
wed. rest
thurs-repeat monday
fri.repeat tues.
sat. rest
sun- 15 min. HIIT, 4xmax crunchies.

A: That's definitely on the high side (more than 100 sets per week), but since most of them won't be to failure (you wrote that only last set specifically is to failure) it should be OK. As usual, make sure to take at least one week off every two months (and more might be a good idea), eat well, and watch for signs of overtraining: lack of strength, lack of appetite, insomnia, irritability, easily getting sick.

The other comment I'd make is that this program doesn't have any shoulder exercises. If you are going for bodybuilding type workout you probably want to include shoulder exercises as well. You can find key ones here.

Finally, it's very possible that you'll be so tired after doing the chest/triceps on Monday or legs on Tuesday that you won't have much energy for the other muscle group you are working on that day so it won't get as good a workout as possible. To avoid that you can either alternate the order of exercises from first half of the week to the second (so do chest first on Monday and Back first on Thursday, for example) or you can split up the muscle groups and exercise each one only once per week (so all of Monday is devoted to chest/triceps and all of Thursday to back).