was he also the founder of the above party you mentioned?
No - The Communist Party of Hungary (KMP) was first established by Béla Kun
Hungarian Communist Party
The Communist Party of Hungary (KMP) was first established as The "Party of Communists from Hungary" in late 1918 by Béla Kun, a former journalist who fought for Austria-Hungary in World War I. 
explain 2 consequences of the hungarian uprising in 1956 The revolt spread quickly and the government collapsed. who did they revolt against? the Hungarian People's Republic and its Soviet-imposed policies what was the basic reason for this revolt? Hungary became a socialist state under the authoritarian leadership of Mátyás Rákosi. Under Rákosi's government, the Security Police (ÁVH) began a series of purges, first within the Communist Party to end opposition to Rákosi's policies. you mentioned about a republic; when was it formed? 20 August 1949 who formed it? Mátyás Rákosi who was he? A Hungarian communist politician. how did he become a leader of this place you mentioned just now? He was the leader of Hungary's communist party from 1945 to 1956. From 1949-56, he was the "de facto" ruler of the Hungarian People's Republic. was he forced to retire? Yes - He was removed as General Secretary of the Party under pressure from the Soviet Politburo in June 1956
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Hungarian Communist Party [SEP] Foundation and early years
The Communist Party of Hungary (KMP) was first established as The "Party of Communists from Hungary" in late 1918 by Béla Kun, a former journalist who fought for Austria-Hungary in World War I. After spending time in a POW camp, Kun, along with several associates, set up the initial workings of the KMP in Moscow in October 1918. These first members returned to Hungary in November, and on the 24th officially created the KMP. The Communist party chose "The Party of Communists in Hungary" (Hungarian: Kommunisták Magyarországi Pártja) title instead of "Hungarian Communist Party", because - at the time - the vast majority of their represented social class: the factory workers the "proletariat" hadn't ethnic Hungarian roots in Budapest yet, and the ethnic Hungarians were only a minority in the newly founded party.