TEs are also called TRAFFIC EXCHANGE sites.
You definitely need traffic! Especially so that you are starting and are timid to invite up front or participate in forums.
These are sites that I personally use. I can honestly say that I did see my stats increase after signing up with these Traffic Exchange sites.
The thing is to put the links that you want to promote (in your case, the PTCs you signed up with).
You may also want to promote a blog, a Twitter site (to be discussed in the posts to come), a MySpace site ... anything goes. Just remember though, do not stray away from your goal.
1. EasyHits4U
2. StartXChange
3. DragonSurf
4. ILoveHits
5. Traffic Witch
6. Traffic Splash