Is it possible to customise the Thanks for shopping with us email clients het when they make a purchase??? Also how do you change the order number so it does not start at 10001
Good morning! This is currently not possible. They are however, featured requests that you can vote on!
You will find the first request here and the second request here .
You can set up an automation on purchase I think. Check the options under marketing tools, automations…? 
Woohoo! Drop that knowledge. 