Should he pray four rak’ahs before and after Jumu’ah as he does with Zuhr prayer?
Question

My sheik said that the prophet said whoever prays 4 rakas sunnah before and 4 rakas sunnah after salatul thuhr hell fire is not allowed to touch his skin. first can you please tell me if this is correct hadith, second i do pray 4 rakas before and after thuhr everyday but when its salatul jumaa i get confused if im supposed to pray the 4 rakas but then salatul jumaa is not like salatul thur, so i just pray 2 rakas before and 2 rakas after. can you tell me if im allowed to pray 4 rakas before and after for salatul jumaa or just 2 rakaas even though im still gonna pray 4 rakas everyday for salatul thuhr.
Praise be to Allah.Firstly: 
Yes, it is proven from the Prophet (peace and blessings of Allah be upon him) that he said: “Whoever regularly prays four rak'ahs before Zuhr and four after it will be forbidden to Hell.” Narrated by Abu Dawood (1269) and al-Tirmidhi (428); classed as saheeh by al-Nawawi in al-Majmoo’ (4/7) and al-Albaani in Saheeh Abi Dawood. 
Secondly: 
There is no Sunnah prayer before Jumu’ah prayer, because that is not proven from the Prophet (peace and blessings of Allah be upon him) and there is no report from the Sahaabah (may Allah be pleased with them) that suggests that there is any specific regular Sunnah prayer before Jumu’ah. Rather it was narrated that naafil prayers in general may be offered, without specifying any number. 
This has been discussed in the answer to question no. 6653 and 14075. 
It is not valid to draw an analogy between Jumu’ah and Zuhr prayer and say that it is mustahabb to offer the regular Sunnah prayer before Jumu’ah as it is mustahabb to do so before Zuhr, because Jumu’ah prayer is different from Zuhr prayer in many ways, and because this analogy is contrary to the apparent Sunnah of the Prophet (peace and blessings of Allah be upon him), which is that he did not offer any regular Sunnah prayer before Jumu’ah. The best guidance is the guidance of the Prophet (peace and blessings of Allah be upon him). If the Prophet (peace and blessings of Allah be upon him) had offered any prayer before Jumu’ah, that would have been narrated to us. As there is no such narration, we know that he (peace and blessings of Allah be upon him) did not offer any regular Sunnah prayer before Jumu’ah. 
With regard to praying after Jumu’ah, a number of ahaadeeth concerning that have been narrated from the Prophet (peace and blessings of Allah be upon him). We have discussed that in the answer to question no. 112031. 
And Allah knows best.