Adobe Flash is no longer available on iDevices.
See Steve Jobs' thoughts on Flash and why Apple no longer supported it: www.apple.com/hotnews/thoughts-on-flash/
Have a look at this great thread also http://www.ipadforums.net/ipad-faq/54703-flash-ipad.html
To find out which iPad you have go to your settings, if you can see a Cellular Data tab you have a 3G iPad then press General - About and look for capacity. You can also look for your Model No. on the back of your iPad and then just google it.
The IPad Forum is a community of members from all walks of life and from all over the world coming together to share our experiences and to help each other learn about this wonderful piece of technology the Ipad. There is a wealth of information already here in the many threads we have so doing some searches will answer most of the questions you have. If then you cannot find the answer you are seeking then by all means post your question. There are many friendly and informed members here only too willing to help you.
Welcome to the forum kisna. To confirm which iPad model you have go to Settings>General>About>Legal>Regulatory, your model number will be there and probably is different that the one listed on the back of your pad. Basically if your model is A139x it's an iPad 2. A1430 it's an iPad 3. A1458 it's an iPad 4.