Toyota Lucida Estima 1995 automatic?

An orange warning light shaped as a vehicle with rear lights(i think they are rear lights)beneath the petrol gauge on the dash board next to the door warning lights has appeared this morning for the first time since ownership of this vehicle,it wasn't there yesterday.I've had this vehicle for nearly 3yrs,3yrs in september this yr.
What is this orange warning light for?Does it have anything to do with the rear lights or any lights?I've checked all the lights,break lights,hazzard lights all the lights & they are all going.Is it a major problem?Is it a fixable job for me to do myself without spending alot of money,paying for a mechanic to fix?I'm a do it myself kinda gal if it's not awkward,complicating or major.If i was a mechanic i wouldn't be asking for assisstance or if i had a manual book to show me what this means i wouldn't come on the net to find out info.Our mechanic is closed on saturday's & so are many others & i don't know anyone who knows anything about Lucida Estima's.
What do i do next?Am i able to fix,replace or repair myself without too much money spent & the hassle of finding the time for a mechanic to repair?
Your assisstance please,most appreciated.

With Kind Regards
Lucida needs help