Hey there.. got your PM but I'll post here.
First thing, you should've done a TN search as these topics have been discussed many times before, you could also look at the "Master Corolla Sticky" located right at the beginning of the Corolla section. You could find out then that there are a few kits available for the AE92 coupes, Bomex, Erebuni, Infinitive Designs (bomex replica) and a few others. On top of that there's always the JDM OEM bumpers and lights. (look up TRDragoon's car for a sample)
As for motors, there's a few options available for the car. You could keep the current motor (4AFE) and do basic mods like exhaust, intake, headers and maybe even throw in a turbo. OR you could opt for a 16V 4AGE, 20V blacktop or silvertop 4AGE or supercharged 4AGZE and go from there.
As for suspension, the SR5 doesn't have the same setup as the GTS coupe does. GTS coupes come with sway bars up front and somewhat stiffer struts to aid handling. there's lots of aftermarket options for suspension though: KYB, Tokico and Koni make struts for the both GTS and SR5. APEX, B+G, Eibach, Intrax and a couple others make the springs.
As for wheels, 15s work best for performance while 16s are somewhat for looks but still perform ok. 17s are more for looks as they rather hurt performance than anything.
I don't really get tired of posting responses every time the same questions come up over and over and over again. But it be nice if people would use the SEARCH button most of the time. Mods maybe its time to update the sticky.