1. Yes you can continue but since after marriage you shifted to new constituency then for voting in same your address needs to be changed. You can continue with your pan and name as same as before it under no law prescribed to change surname after marriage.
2. Yes you can continue no law bounds you to change that.
3. No they cannot pressurize you.
The question of address in voter id.card is concerned is regarding voting rights.so in that case when you are married and start leaving separately or with in-laws meaning there by change your address than if constituency change you can register in othe.rconsituency for voting in same.
Also the address used doesnot signifies any patriarchy or anything it is for convenience since the permanent address change may be case.for man it can change in some.parts of India so for sake of brevity it can be changed.