Having Trouble With Paths
That first error, "SyntaxError: expected expression, got "&lt;" suggests that something in WordPress - a poorly behaving theme or plugin - is injecting text on every page load.  That'll screw up CiviCRM.

I would troubleshoot this by switching to one of the core themes (e.g. twentyseventeen) and disabling plugins (ideally on a test site if this site is already live).  Assuming the problem goes away, you can turn things back on to identify the bad actor.