Private Questions Titles show on a user’s profile page even to non-logged in users

As I said a few minutes ago in a question, this will be fixed in 2.4. Currently working on same issue.

reseting the vote and reputation

This will be fixed in 2.4

Help to make a default page subscriptions

Its already exist in user profile -> subscription. You can check template in user/subscription.php

Items translation

Did you tried this POT ?

Enabled Recaptcha with correct keys but then posting does not work

Its tags issue not recaptcha. You must add comma after a tag. This issue has been fixed in latest RC version. You can download from our Github repository.

how to redirect to anspress user page

You can add this filter to your theme functions.php https://gist.github.com/rahularyan/71c58990809628abc9df