Which machine shud i buy........................what is machanical sewing............my budget is Rs.7000-8000.

A mechanical sewing machine has only knobs & dials
a computerized has a LCD screen-some screens are large & some are small,,a lot of people like computerized or electronic- because they are push buttons,,
I personally have a mechanical sewing machine & a electronic or computerized sewing machine
I use both to make clothes & quilts, my husband which does quilting like the electronic machine better, cause it's push button.
when I make buttonholes I use the electronic sewing machine because it does it in one step automatically
there are a lot of advantages to the electronic sewing machine, push button, one step buttonhole,
needle threader, decorative stitches, the stitch length & stitch width are push button selection
when you get a sewing machine make sure it has a manual with it,,that's very important,,it will tell you the different functions of the machine & how to do the setting.
as far as brand of sewing machine, I've owned singer, babylock, brother, necchi, machines, there are good & bad in any brand, when you buy one if it doesn't work when you take it out of the box & start sewing--take it back & get another one--cause machine should be ready to sew when you take it out of the box
happy sewing