Yes, brake fluid is cheap. Bleed the system and look for leaks along the lines and at the master cylinder and wheel cylinders.
If you are going to keep the truck and want some brake tools:
This simple one-person bleeder kit is a good start. (I use this one on my trucks that do not pressure bleeding)
A step up would be
this bleeder kit or
this bleeder kit .
These tools are now on sale in the stores (for adjusting the brakes).
This set of adjusting tools is also sometimes on sale.Eventually, you'll have to adjust the brakes. If the truck has been sitting for a long while, do not be surprised if you have to pull each wheel/drum and check out (and lubricate and maybe replace) other brake adjustment parts.
