Rumyes,

You can get attested copy of your transcript from TU. They will not send your attested copy directly to ur university as far as i know. But, if you have some one in nepal, you can tell them to go Jamal (i am not sure whether they moved that department to Balkhu-KTM) and pay to attest your transcript with appication.(RS 20 per page-as far as i remember when i did mine). They will give your attested document in sealed envelop which your friends/family can send directly to your university. 

That is how it works as far as i know.

It was 3-4 years earlier. So, i am not sure, these days.