Well i got modders resources from a couple websites and i want to use them in a mod im making but some come with esp's. I was wondering if i needed the esp's for them to show up in the construction set so i can place them ingame myself??

The esp is only if you want them in game as they are. To use them in the CS, you only need the folders. Or rather the contents in them.

As you're just starting out, you'll want to do a little reading. Here are a few handy links for you.

http://cs.elderscrolls.com/constwiki/index.php/Main_Page - Pretty much all knowledge about the CS and it's functions can be found here along with a host of tutorials on how to do just about anything.
You'll want this tutorial in particular: http://cs.elderscrolls.com/constwiki/index.php/How_to_use_custom_resources

http://www.invision.tesalliance.org/forums/index.php?/forum/82-esiv-oblivion-classes/ - Here you'll find classes, led by modders, to teach you how to mod, script, model, worldbuild, etc...

Thanxx im pretty good with make interiors and landscape editing its just scripting and stuff im not good at...