Go to this site http://getemoji.com/, and copy and paste them, if you use firefox or google chrome, you can download an emoji extension that you can access from the top bar. Although, it is easier to use emojis on a phone or tablet since it's built into the keyboard. I mostly use them when im on my phone since i'm too lazy to copy and past for ever answer xD
I have no idea. I think you have to be using Blurtit on your phone to post emoticons.
dont use emoticons, express it through words