Lalbagh, Cubbon Park, Vidhan Saudha, Tippu Palace, Bangalore palace, Bull temple, ISKON temple, Vishweshwaraiah museum, Musical fountain, Venkatappa Art Gallery, Dodda Aalada mara, Pearl Valley, Bannerghatta National Park, etc.
If you have some more time, Nandi Hills, Sahasra linga temple, Gavi Gangadhareshwara temple,
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Lalbagh, Vidhan Saudha, Tippu Palace, Bull temple, ISKON temple, Vishweshwaraiah museum, Musical fountain, Cubbon Park, Bangalore palace, are some of the places that you can explore in Bangalore. Btw, i wud advice you to take holiday packages of any online travel portal. Their experts will help you to figure out everything. i generally prefer yatra.com for my travelling plans. and the experience have always been awesome.