My sister is the executor but the four of us siblings are the owners of the house does executor have right to lock us out or take things and should i

The executor is not the executor until a court appoints her.  She must hire a probate attorney and present the Will for probate (proving).  Until a Will is admitted to probate by a court, it has no legal effect. When the Will has been admitted to probate and your sister has been appointed by the court, she will have the authority and the obligation to gather the assets, pay the bills and distribute the rest according to the Will. This may well involve evicting you from the home.