Should I use AP scores to exempt classes when trying to transfer? I am considering going to De Anza College (California community college) and trying to transfer/TAG into a UC or similar college. Is it worth it to, for example, use my APCS A test (got 5) or AP Calc BC (5) to exempt some of the entry-level courses that I need to transfer? Or is it more worth it to be conservative and maximize grades?
Will colleges look down on students that have AP scores yet take a similar course in college?
How would this affect my eligibility to TAG into the various UCs with the program? 
Note: I have finalized my choice to enroll in a cs program if I were to attempt a transfer.
Other AP scores that I currently consider using:
AP Chinese (will take)
AP Chem (4)
AP Physics C (will take)
You should maximize learning and not grades.  If you already took an AP course and actually learned the content, don't take a course that is the same as the AP course unless you are required to do so.
Repeating courses for an 'easy A' will waste lots of your time and potentially your money too.  And there's no guarantee the course won't turn out to be much harder than you expect.