which phases did it have?
The Latin and the Greek phase
Renaissance
Broadly speaking, this began in the 14th century with a Latin phase, when Renaissance scholars such as Petrarch, Coluccio Salutati (1331–1406), Niccolò de' Niccoli (1364–1437) and Poggio Bracciolini (1380–1459) scoured the libraries of Europe in search of works by such Latin authors as Cicero, Lucretius, Livy and Seneca. By the early 15th century, the bulk of the surviving such Latin literature had been recovered; the Greek phase of Renaissance humanism was under way, as Western European scholars turned to recovering ancient Greek literary, historical, oratorical and theological texts.

Unlike with Latin texts, which had been preserved and studied in Western Europe since late antiquity, the study of ancient Greek texts was very limited in medieval Western Europe. 
did the renaissance in europe lead to flourishing of humanism and individualism Yes, the intellectual basis of the Renaissance was its version of humanism, derived from the concept of Roman "Humanitas". when did the renaissance take place? It covered the 15th and 16th centuries what is its origin? Supposedly the late 13th-century Florence, in particular with the writings of Dante Alighieri and Petrarch, as well as the paintings of Giotto di Bondone.
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Renaissance [SEP] Latin and Greek phases of Renaissance humanism
Unlike with Latin texts, which had been preserved and studied in Western Europe since late antiquity, the study of ancient Greek texts was very limited in medieval Western Europe. Ancient Greek works on science, maths and philosophy had been studied since the High Middle Ages in Western Europe and in the Islamic Golden Age (normally in translation), but Greek literary, oratorical and historical works (such as Homer, the Greek dramatists, Demosthenes and Thucydides) were not studied in either the Latin or medieval Islamic worlds; in the Middle Ages these sorts of texts were only studied by Byzantine scholars. Some argues that the Timurid Renaissance in Samarkand was linked with Ottoman Empire whose conquests led the migration of Greek scholars in Italian cities.