Ok so you need to use the minimap to do the quest
1) Boxing - follow 1,2,3,4,5 in the minimap to get gears
2) Running - there is a running npc which is marked in the minimap
3) Basketball - there is basket ball court also marked in the minimap where u can dunk
4) Friends - You just give apples and burgers to those people who ask for it to do that quest
Thanks for giving my game a try!