The message in your second post is not a problem. It's just telling you that you're opening an old project.
The messages in your first post are just telling you that you don't have the effects installed that the creator of the project had installed. Ask the creator of the project about that.
Is there a way to view it from the template like it'll tell me what effect is missing?... The only one he said was needed was
digi damage effects v2 which i have 2.5 installed
Those error messages look like messages about expressions that aren't linked correctly anymore due to the names of effect controls changing. This is likely due to a difference in the language the creator used and the language of your AE. You will need to find the broken expressions in the template and then figure out what they're meant to point to.
This will likely require some familiarity with the language of the template's creator as well as a decent idea of how to use AE...