How to parse and translate 必须要有? Edit: typo, wrote '必需‘ instead of '必须’.

Is '必须要有‘ 2 or 3 words? What does it mean? It seems to say 'must have (必需） must （要） have （有）

人必需要有自己的追求，

In English we use 'needs must', for example, often heard in 'Needs must when the devil drives', although it is somewhat old-fashioned, but not archaic. It is still heard.

Is ’必需要有‘ 'needs must'? 

人必需要有自己的追求， 'a person needs must have a pursuit'

Cf: Shakespeare's 'All’s Well that Ends Well': The Clown says to the Countess: “My poor body, madam, requires it: I am driven on by the flesh; and he must needs go that the devil drives”.
ABC dictionary defines 要有 as

V.
need; require

giving the example:

开箱子要有钥匙。
Kāi xiāngzi yàoyǒu yàoshi.
One needs the key to open the suitcase.

必需 you can think of as essential, indispensable or necessary.

Your translation:
人必需要有自己的追求， 'a person needs must have a pursuit'
while not wrong - could probably be better thought of as definitely necessary instead.