sp15tax2.js

$(document).ready(function(){   
  
	var scriptbase = _spPageContextInfo.webServerRelativeUrl + "_layouts/15/";
	
	$.getScript(scriptbase + "SP.Runtime.js",
        function () {
            $.getScript(scriptbase + "SP.js", function(){
            
            	$.getScript(scriptbase + "SP.Taxonomy.js", execOperation);

            });
        }
    );

});

function execOperation(){
	
	var context = SP.ClientContext.get_current();
	var list = context.get_web().get_lists().getByTitle('TaxonomyCustomList');
	var listItem = list.getItemById(1);
	context.load(listItem);
	context.executeQueryAsync(function(){
	
	//Multivalue Taxonomy Column
	
	var taxEnumerator = listItem.get_item("MyTaxColumn").getEnumerator();
	
	while(taxEnumerator.moveNext()){
		
		//Label
		var currentTerm = taxEnumerator.get_current();
		
		//Label
		var label = currentTerm.get_label();
		
		//Term GUID
		var termGUID = currentTerm.get_termGuid();
		
		//Type ID
		var typeID = currentTerm.get_typeId();
		
		//WSS ID
		var wssID = currentTerm.get_wssId();
	
	}	
	
	},function(sender,args){
	
	console.log(args.get_message());
	
	});

}