How to combine nodes-editor transparency with uv-mapped textures in Blender Render? Partial transparency with node editor ignores other objects behind (draws world background) asked here for consequences that came up after solving this problem.
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I so far found a question which has been answered but the answer doesn't help me with my problem. (See this here: UV Map not being applied to object) 
I have got an object that shall be acting as a low-poly solution for a horse mane. Thanks to someone who replied to an other question, I figured out how to get the object being transparent, following the alpha of the texture. But when I do that, the UV settings dissapear from the texture/material tab. I cannot use cycles render, my computer is too slow.
Is there a way to keep the UV mapping and make the texture be transparent where its alpha value is (nearly) 0? If anyone knows how to fix this, or has got even a hint, I'd be happy for any reply. Edit 1: I used this reply for changing the object settings: Blender Cloud texture settings: How to get from 0 alpha partial transparency in render?

This is how it appears when I activate the nodes to make the edges transparent; the UV mapping got messed up and the UV-mapping option is not aviable in the apropriate tab. 


When I deactivate them it looks like this: 
 
However, the object isn't transparent and somehow (what I didn't expect) the color turned black though it was a light grey.

 Both screenshots were taken from rendered 3D view (so no real render just preview)

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Edit 2: After changing the nodes as visible in the following screenshot, the UV map turned mapped right. Still, the transparency value is a bit too strong. After I made the horse mesh visible, I found a second error. The mesh is now transparent, but it is displaying the world background instead of the model laying underneath. I am going to do a testrender to see if that happens in render output too or just the 3D-View that trolls me here. 

 Thanks everyone for trying to help me so far. I have to admit that I'm pretty new to nodes editor, but I hope to gain some experience with it and being able to cope with problems without need to ask about everything^^
You clipped your first screenshot right where it mattered , seeing your complete node setup would help solve the issue.

Are there any more nodes in your material? Is there anything connected to the Vector socket of your image texture?

If not that is where your problem is. When using node materials and textures you must specify which type of texture coordinates to use in your texture within the node setup, to correctly display it.

Before your image texture node add a new Input > Geometry node, choose one set of UV Coordinates from the pull-down menu and connect the UV socket to the vector input of the image node.