You can acquire a Toll-Free number for $3.95 with a per minute rate of 2¢ – 23¢ depending on the origin number. You could do a vanity lookup with help from support, but you would be charged a larger fee if they find the number you would want. This is in addition to the setup fee, and a prorated monthly fee for the telephone number.
If you wish to get a number that is local to a particular area, this would be $6/month for unlimited incoming calls. This also includes a higher setup fee which is charged at time of purchase in addition to a prorate of service. If you want multiple phone numbers, you can set the numbers to ring other extensions, or even go straight to voicemail.