I did my motor mounts a few months ago, there's a tutorial on youtube that's pretty good. I put the front of the car on jack stands, then supported the engine via the jack under the oil pan and used a 4x4 block of wood. I did the passenger side first, removed the bolts securing the motor mounts to the engine block. I had to do this as there wasn't enough clearance all the way jacked up to remove the rubber mount.
As for the driver's side, I moved the jack more towards the driver side as I jacked up the engine via the 4x4 block of wood. That allowed the engine to be jacked up enough to slide the rubber mount out without removing the motor mount attached to the engine block. I first removed the oil filter to allow enough space.
Be careful jacking up the car & engine. Take your time and be patient. I did it myself but would help with another person.
Suspension: Tanabe Sustec Pro RR 16kg, Cusco UCA & trunk bar, Figs MegaArms, Tanabe SB, UR underbraces, fender brace, floor bar, TRD door stabilizers
Brakes: Supra BBK w/Racing Brake 2 piece rotors
Engine: BC264, Fidanza, PLP intake, Dezod headers, Tanabe exhaust, Koyo radiator, Gates belt, Fig heat shield, Derale cooler, VibraTechnic engine mounts
External: Lsportline, Beatrush underpanel & radiator panel
Internal: Recaro Sportster CS
Wheels: TRD T3 Bronze/Michelin PS4S
4.10 Torsen LSD