Probably the wrong place to post, but yeah.
All you really need is somewhere to put the pics. You could find some free webhosting and use that, or there are services like
www.photobucket.com .
When you've got your pics, get the address of it. it might be something like
www.webspace.com/users/jet81u/mycar.jpg or
www.photobucket.com/mew/ski/jettrx.jpg for example.
Then if using it in a post, put IMG tags around the URL like this, and voila!:
[IMG]http://www.webspace.com/yeah/jet81u/car.jpg[/IMG]
Just please be considerate and don't link HUGE images as it'll take ages for people on slow connections to download.
If putting it in members rides, just put the addresses into the appropriate fields.