It’s up to you. You may have them blessed or not. Please understand that if you bless them, you have to be careful how you treat them and can’t just stick them in an attic for storage or throw them away. So only have things blessed that you intend to take special care of.
There is no requirement that holy pictures be blessed; typically in my family we have only had rosaries, medals, crucifixes, and scapulars blessed. Some families have statues blessed. I don’t know anyone who has had pictures blessed.