Sachin,
Just make sure the VTP configuration revision # on the new switch is lower than that of the existing VTP server switch, enter the VTP configuration - VTP mode as server, domain name, password etc - set up the trunk and the new switch would dynamically learn all the VLANs from the existing VTP server. If you do it this way no downtime would be required and there should be no disruption to production traffic.
Have a look at this document to learn more about VTP configuration revision.
http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_35_se/configuration/guide/swvtp.html
HTH
Sundar