How do I...Disable enable kendo Grid filter if list data is more than 100 records.

There is no direct way to this at run time but you can tweak it around by doing  like this by hiding it with another div

<pre lang="Javascript">if(condition1){
 var width = filterBtns.eq(0).outerWidth();
        var height = filterBtns.eq(0).outerHeight();
        filterBtns.each( function(index){
            var position = $(this).offset();
            $("<div class='cover'>").css({
                "width": width,
                "height": height,
                "position": "absolute",
                "top": position.top,
                "left": position.left
            }).appendTo($("body"));
        });
}

else {
 $(".cover").remove();
    }