No!  We do not recommend the use of toll-free lines.
Consequently, there are companies out there who claim to be ecommerce experts that tell you that you must use a toll-free line.  That is hogwash.  More importantly, its expensive and completely unnecessary.
Toll-free lines were originally set up as people had to make expensive long-distance calls.
With most people using mobile phones, that is a thing of the past.  While toll-free numbers allow you to track the phone number of everyone who calls you (they cannot hide their number) that is just not necessary.
And most toll-free numbers have been used for generations by various companies which will cost you money in the long wrong since you pay per minute to use a toll-free number.