1. I've made a cloud and then got it duplicate, now I need the second cloud to look squashed under load but all I can do is resize it and move it. I need only the top part to get resized (I hope am making sense)
2. I've made a speaker I need to trim off abstractly the lower portion of it (just a little bit) I tried using the eraser but it erases the whole speaker.
It sounds like you need to learn about the node editing options in Inkscape.
http://tavmjong.free.fr/INKSCAPE/MANUAL ... iting-Node1) Specifically for the cloud editing use

or the tweek tool

. When using the tweek tool, I think you should select the "push path in any direction" mode ( it looks like a curve), increase the width of the tool and drag it to squash the top of the cloud.
http://tavmjong.free.fr/INKSCAPE/MANUAL ... Paths.html2) For the speaker, you can either use the node tool (:tool_node:) to select the object and delete the nodes from the part you dont want to keep. Alternatively you can create a big rectangle over the parts you do want to keep and use it as a clip-path (select the rectangle and the speaker object then go object->clip->set
3. Are there any AutoShapes in Inkscape? they would make life easier. I've to even draw music notes manually
3)Apart from the ones on the left hand side (

), No. However there is an online clip-art library that has svg shapes that you can use:
http://www.openclipart.org/search/?query=music+note (just download the shapes you want and drag+drop or copy them into your document.