Hello Ravi,
this is a sales question you need to discuss with your local PTC rep or reseller. They can advise on how you can upgrade your existing product with a newer product.
If you need any training on PTC Creo 1.0 or PTC Creo 2.0, please try PTC University Learning Exchange first for some free tutorials: http://learningexchange.ptc.com
Bettina