TrackOne was meant to be a general first year engineering study that gave 2nd year access to all engineering programs (chem, civil, computer...) expect for the Engineering Science.
If you to page 11 of this Prospective Student Guide for engineers, you will see a neat diagram of how it works.
http://www.discover.uoftengineering.com/pdf/UT_engineering_prospective_student_guide.pdf
Also, here are the courses of each program to show why TrackOne cannot replace the first year of Engineering Science.
From http://www.undergrad.engineering.utoronto.ca/Assets/UndergradEng+Digital+Assets/calendar1011/Chapter+7.pdf
TrackOne Year
Fall
Engineering Strategies & Practice I - APS111H1 F
Ethics in Engineering - APS150H1 F
Mechanics - CIV100H1 F
Calculus A - MAT196H1 F
Linear Algebra - MAT188H1 F
Computer Fundamentals - APS105H1 F
Winter
Engineering Strategies & Practice II - APS112H1 S
Calculus B - MAT197H1 S
Introduction to Materials and Chemistry - PS104H1 S
Dynamics - MIE100H1 S
Electrical Fundamentals - ECE110H1 S
Introduction to Engineering - APS191H1 S
ENGINEERING SCIENCE 1st Year
Fall
Structures and Materials - An Introduction to Engineering Design - CIV102H1 F
Praxis I - ESC101H1 F
Engineering Mathematics and Computation - ESC103H1 F
Calculus I - MAT194H1 F
Classical Mechanics - PHY180H1 F
and one of:
Introduction to Computer Programming - CSC180H1 F
Computer Programming, Algorithms, Data Structures and Languages - CSC192H1 F
Winter
Systems Biology - BME105H1 S
Fundamentals of Electric Circuits - ECE159H1 S
Praxis II - ESC102H1 S
Linear Algebra - MAT185H1 S
Calculus II - MAT195H1 S
and one of:
Computer Algorithms, Data Structures and Languages - CSC190H1 S
Free Elective