Refurbished Macbook Pro is running very slow
I recently bought a Refurbished Macbook Pro from techtrade. It was rated gold standard however, it is running very slow. Applications are very slow to open and are often unresponsive. Sometimes even typing and tracker pad is slow to respond. It effects my general use of it everyday. I have used CleanMyMac X which has seemed to have helped a little but still have some issues. I also ran EtreCheck and it has highlighted 3 major issues: no time machine backup, failing hard drive and Antivirus software issues. Minor issues include Upgradeable hard drive, Upgradeable RAM, Out of RAMT, Unsigned files, Vintage hardware, Encrypting or decrypting and Limited drive access. I have pasted the link to the full report below. Can anyone provide any help on how to solve these issues (obviously I am mainly concerned with the major issues).
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MacBook Pro