how i will fetch field's dataType, length(if field is Text type), label and helpText from Object in

You can use skuid.model.Model.getField() to get field metadata. All four of the things you mentioned are included, but here is the full list.

i am fetching
 var vt=  skuid.model.Model.getField(take_priority__c); 
  alert(‘>>>>>>>>>>>>>>>’+vt);

Not working…

Also
var vt=  skuid.model.ContFlds.getField(take_priority__c);    alert(‘>>>>>>>>>>>>>>>’+vt);
ContFlds- my model name

This syntax will give you the field metadata object. 

skuid.model.getModel(‘ModelName’).getField(‘FieldName’)

Can you share me the links of good code stuff of skuid…i am new in skuid…

http://help.skuidify.com/m/11720