How do I survive in the desert?

Hint 1 of 7:

You need transportation.

Hint 2 of 7:

What are those things outside the town's gate?

Hint 3 of 7:

Maybe the guard knows about them.

Hint 4 of 7:

Seems like someone will be there on day 2.

Hint 5 of 7:

Maybe you can buy a beast from that someone.

Hint 6 of 7:

Go back on day 2.

Hint 7 of 7:

Buy a Saurus.