Pattaya is a very lively city. Getting local transportation is easy, but they are not so cheap. Tuk tuk seem to charge hefty, when you compare to Bangkok.
Food, sight-seeing and shopping
Getting vegetarian food was no problem at all.
Noon nooch village is a must do.... The experience with animals there is not to be missed.
Tiffany show is also great. Cant afford to miss it.
Activities & things to do
Coral Island
Tiffany Show
Noon nooch village
Walking Street
All the above is must do.
Travel tips, How to reach, travel warnings etc.
You can take a bus direct from Bangkok airport. Its easy and cheap for 124 THB per person. And local transport is good by tuk tuk or taxis. Negotiate first.