Radiator I Need A New Radiator I Just Wanted To Know Is It Hard To Put In? If I Got A Book Could I Just Do It Myself?
I've Put In Other Car Parts I Just Don't Feel Like Paying A Mechanic 400 For Something I Could Do Myself If It's Easy Enough

I Agree W/ Flanders, If You Get Air Pockets In The Cooling System You Could Damage Your Motor.. Take It To A Shop, If You Live In Ohio I Just So Happen To Work At One.. Ha Ha

Texasm gave a very good answer, I just want to add the following. Don't bother with the drain screw, these are usually rusted tight, just pull off the lower hose, have a large pan under it. The coolant will dump in 30 seconds (much faster).
Next tip, go buy new upper and lower rad hoses, the old ones are soon going to burst, better do this now while you are investing in new anti freeze. While you are at it, I suggest replacing the thermostat, it's just another few bucks and two bolts to remove the housing, scrap the old gasket, put on new and you are set for another 100,000 miles on this car!

I've done many jobs and any time I try to save someone a few bucks for a rad hose, it usually breaks within 6 months and of course they assume I did a crap job on the rad.

Your toughest job will be removing or replacing any rusty bolts. Oh, don't forget to disconnect the battery before playing with the fan, it can hurt you!

You might be able to. If you do and don't get it right you could cause expensive damage . I love my Celica!