Is there a quicker way to select all the tasks in a project apart from using CTRL-click on each one?
Unfortunately, it's not possible to select all tasks in a project right now (other than manually clicking on each while holding CTRL), but we'll consider adding such option in future updates and you're welcome to vote for this request in our Votebox: http://todoist.com/Vote/showProposal/577/
+ for the request to add the bulk select feature.
(just imagine you upload the wrong template into a project - it means you literally have to go through 80 newly created tasks in the project and delete them manually). this has just happened to me when I tried integrating a task sheet from excel into word and then into todoist.
I created a Chrome Extension that selects all tasks at once https://goo.gl/a0Lvxs
This should completely fix your problem :)