How do I Turbo Boost in Macbook Pro
You can't.

It's activated dynamically based on the workload.  There's nothing you can enable that turns on Turbo Boost.

From Intel's Website for the i7-640M Processor found in the 17" Mid 2010 MacBook Pro:


  Intel® Turbo Boost Technology dynamically increases the processor's
  frequency as needed by taking advantage of thermal and power headroom
  to give you a burst of speed when you need it, and increased energy
  efficiency when you don’t.


This applies to all computers with Intel processors with the Turbo Boost technology, not just MacBooks.

Intel's Turbo Boost Technology Note: 


  Intel® Turbo Boost Technology 2.0 allows the processor to operate at a
  power level that is higher than its TDP configuration and data sheet
  specified power for short durations to maximize performance.