Could be,
Rotted brake lines,
Leaky caliper(s),
Leaky master cylinder,
It all depends on what part is leaking what fluid. Brake cylinder would leak brake fluid. Axle seal would leak gear oil.
where is it leaking from?
brake fluid leaking from a brake drum indicates the brake slave cylander on that wheel is leaking and needs to be replaced you will not see the actual leak with out removing the brake drum
Could be low on brake fluid. If it is low you either needs brakes or you have a leak in the system.
If your brake light is on that inducates that your brake fluid level in the brake master cylinder in your engine compartment is LOW ( assuming that your emergency brake isn't on ) Having a low brake fluid level will also turn on your ABS light
That's automatic transmission fluid , or power steering fluid , so it would depend on where it is leaking from
Brake fluid in a Toyota Sequoia could be leaking from several places. Check the wheel cylinders first as they are a common place to leak.
Seal in brake caliper is leaking and needs replacement Flexible brake line to the caliper is leaking and needs replacement
Replace the leaking part
There would be break fluid OUTSIDE of the lines and reservoir
take it to the shop to get fixed!
Worn brake shoes or pads. A leaking brake pipe. Low brake fluid. Air in the brake fluid pipe.