umm, i ordered my tires from one of the 4WD magizines. about the lift, a splash is 2wd, so you really need a kit. youll need new shocks, and springs for the rear, and the front, i think youll need a bunch of little shit including springs, shocks, a-arms, maybe a bigger pitman arm, and probly a couple more. if you buy a kit, it will include front and rear, but youll spend somewhere around $700, and another $500 for install unless you do it yourself.
you might be able to get buy with a body 2"-3" body lift, the lift is cheap, but installation im not sure of.
and the speedometer can be fixed, i think its just a computer programming thing, but personally, id leave it alone, it odometer will rack up less millage.