特首有冇刑事豁免權呀？

Chief Executive of Hong Kong does not have immunity from prosecution, regardless what crime he commits. Unlike members of Legco(立法會), they have the immunity during LegCo Meetings. [See below]
The other category of people who have immunity from prosecution are those who are Diplomats(外交官). They've rights under the International Law, Vienna Convention on Diplomatic Relations 《維也納公約》 to be immune during their diplomatic relation in a foreign country.
Under HK Laws. Chap 190 國際組織及外交特權條例 Sch. 1
被起訴及法律程序的豁免權。
Under HK Laws. Chap 382 立法會(權力及特權)條例 Sec. 5 免遭逮捕
任何議員─


(a) 在前往立法會或任何委員會會議途中，在出席會議或會議後回程中，可免因民事債項(如訂約承擔則構成刑事罪行的債項除外)而遭逮捕；
(b) 在出席立法會或任何委員會會議時，可免因刑事罪行而遭逮捕。

沒有。
因為司法機關是獨立的。
不受他人干擾。

天子犯法與庶民同罪 ,咁你話有冇

是沒有的，天子犯法與庶民同罪