Yes, its still good to get an engineer certificate for modded cars, especially to the cops off your back., Great work with the restoration work on the Escort panal van :)
Even though these remotes cost around $60, they do tend to last for a while so you do get your money's worth. So may as well stick to original.... (unless you can replace the battery, even better)
Those Dealer paint protections are only worth it if you get it for less than $300. (thats the most a carwash place would charge) EDIT: Previous thread on Paint protection And Second thread
An aftermarket sunroof is an option to look into if you're keen. id be worried about it leaking though. +1 to a new Grille. With the floor mats, ive noticed that some Toyota spare parts stores still have them. You may want to make a few phone calls. The only problem is they cost around $100...
you can remove the weather plastic, it should stick back on. If it doesnt stick back on for some reason, you can use butyl tape on the plastic to stick it back on
Click here for some information about Anti-theft Alarm. You dont really need the sensitive panic feature though. Its good to have it as a peace of mind..