your clients have to write them for you, you can't review yourself.  It has to be written by a hobbyist who has seen you.  If you know that a client is a TER member, and you feel sure he had a good time with you, simply ask if he will write a review.

To post an ad, I believe you have to have the TER badge as a link on your website, someone correct me if I'm wrong.  As the previous poster said, read the newbie manual on this page, it should answer many of your questions.

Swim

How Do i get reviews on my account, and also how do i a post provider ad

the life preserver.  Read it and then read a few pages on the Newbie Board and you will have most of the answers to your questions.