what is the ultimate purpose of a person who practices hinduism,buddhism,jainism,sikh

what is the ultimate purpose of a person who practices hinduism,buddhism,jainism,sikhism?

Travel and Preach people and teach them Thea values to stick them self to.

Love, humanity, extend a helping hand, doing a favor without expecting one back... You can find one of the persons these days is Shri Satya Sai Baba ..
http://www.srisathyasai.org.in/

Asoka (an Indian Ruler , once upon a time) was on path of preaching Bhuddism after he saw devastation.

i didn't see Judaism on there...Lil..but if you want to know about Jews, we serve god and do what he asked us to do hundreds of years ago (the 613 deeds etc.). ask a rabbi for more info.

I can only answer you in terms of Buddhism.

To do all good,
Abstain from all evil,
Cleanse ones mind.

That is the teaching of all the Buddhas.