1988 toyota efi 4x4 lags on excelleration unless floored

You can get them from an auto parts store such as auto zone, pep boys, etc

the engine light will not come on unless the fault is detrimental to the engine or gear box. Run fault codes to find misfiring coils and injectors or other sensors that is causing the problems.

check your fuses and fuel filters and spark plug wires and wires they may be craked or cored out

check the floor pan and if there is a series of threaded holes near the center then toyota bucket seats will fit just fine

Yes & no
Down load a service manual for your vehicle from this website

It will describe where everything is and how things work correctly

http://ezinearticles.com/?Find-the-Free-Auto-Repair-Manual-You-Need-Online&id=92717

Passanger side, on the floor, right side foot panel below the glove box.

go to autozone.com and register for full free online repair manual. It will have all your engine codes in the diagnostic page.

I guess the best , easiest & cheapest thing to do, right of the start is get fluid & filter changed, and lube all cables & linkages thoroughly, unless that's all been done recently.

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528004d158

The most common reason for the EFI fuse to blow is the wiring is rubbed through somewhere in the engine wiring harness, this fuse supplies power to many EFI parts on the engine, always look for shorts where the most movement is, the engine is that place, most likely the next time you go down a really rough road the short may occure again, carry a few fuses just to be safe.