If you're going monday-thursday I would so something like....
Monday- Push movements (chest/shoulders/triceps)
Tuesday- Legs- compound. squats and maybe deadlifts
Wednesday- Pull Movements (back/biceps)
Thursday- Legs/abs-isolated. machine leg curls etc. light weight higher reps.
Alotta guys wont recommend 4 days in a row, normally I wouldn't either. But if thats your schedule and you have 3 days off, you can make it work.
Another way to go would be..
Monday- Upper body heavy
Tuesday- Lower body heavy
Wednesday- Upper light
Thursday- Lower light
basically you don't wanna do the same muscle groups two days in a row. and if you're going to train like this with the same groups 2 days apart, don't do 6 different exercises for each muscle group. pick 2 or 3 and really concentrate on making them effective.