As far as the first 2 columns go, they describe the range of IP addresses in question. The gateway is the next hop, and the interface is the IP of the local NIC the packet will exit to get to the next hop. Metric just a measure of cost.
As for the rows, there's always a lot of entries that more or less just add confusion. The best thing to do with a route table in question is to compare one that works to one that apparently does not.
Any gateway of 127.0.0.1 is just the loopback adapter. These entries usually just add clutter.
The network destination of 0.0.0.0 is your default route.
The network destination of 224.0.0.0 is for multicast addresses.
The network destination of 255.255.255.255 usually has the IP of the local NIC for gateway and interface.
If you have a more specific question I'll do what I can, just please post the route table here.