if you played with legos as a kid your ok lol
go to wal mart buy a toyota 1984 and up stero bracket and wireing harness
splice the stereo to the harness (the colored wires match)
save the small steel brackets from the old deck
pick the right trim/bracket for the application
(key) pull the steel sheith off the new stero you dont need it it should slide right off line up the screw holes from the stock bracket to the screw holes in the stereo plug it in bolt it in and go
youl need red butt connectors and a crimp er tool
im kinda rambling so if you didnt get ne of that just ask