Hello - yes you can attach a photo - theres the little 'paper-clip' icon or you can use a photo hosting web page, lots of us use photobucket.com - its free upload your photos there, its real easy, they also generate the codes for you, so you use them as a link or post the photo directly here
Do check out TCS rules - things about size etc.........heres a link
A photo hosting site is best as it reduces the "load" on TCS. Photobucket is probably the most popular here, and as mooficat stated they generate the codes so all you do it copy and paste. They also have editing tools to make sure the pic is not too big.
I sent you a PM on how to post pictures. If you have any other questions as you find your way around the site, please feel free to click on my username and send me a private message. I'll be happy to help.