PMs (private messages) are up the top right corner, just click on there and you'll be able to see what you're doing.
Bidding is simple, you just make sure you have the TC and tell them "I bid (xx) amount of (xx).
Please read the rules of the forums and the tutorials located
here they will help you a lot.
Also, stop spamming and double posting, if you have any more questions please contact me via PM, stay on topic to the thread.