(a) Their hobby is fishing. -- OK
(b) Walk along Jalan Putra. / Walk straight along Jalan Putra. -- OK
(c) Walk down the road until you come to a bridge. -- OK
(i) Walk straight and then turn left into Jalan Pahang.-- OK
(ii) Walk over the bridge and then turn left into Jalan Pahang.
(d) The Butterfly Farm is situated on your left.-- OK
The Butterfly Farm is next to / beside a Hindu Temple on your left. -- OK
(what are the difference between “next to” and “beside” .) -- Usually, there is no difference. 'Beside' may be slightly closer than 'next to'.