Before I call an HVAC repair person, can I just tape this?

[Suzanne A.]

Not sure exactly what's going on here with these air leaks, but can I just tape over these spots with foil HVAC tape?  Just wanted to check before I call an HVAC person to evaluate.  This is in a house I'm under contract for.  Just another thing on a very long list of repairs so trying to keep my costs down.  

There are a quite a lot more leaky spots than what is pictured.

Thanks very much!