pads are pretty easy on the front of a Ti. the Brembo's have 2 pins that help hold the pads in position; a hammer and hole punch are required to knock them out, and a spring-clip/plate will come out too. you should then give the calipers a good clean to minimise brake-squeal. the pistons need to be pushed back; first loosen the brake fluid reservoir cap in the engine bay; use a narrow block of wood or similar, and use it to push the pistons back (do-able by hand). this will squeeze brake fluid back up to the reservoir so keep an eye on the level; it's not expected to overflow, but you may need to suck some out (if it ends up over the 'full' line).
apply copper grease to the edges of the new pads, on the areas where they slide in/out against the calipers. if there's a (metal) shim attached to the back of the original pads, reuse them. the shims and grease help prevent squeal.
once re-assembled and wheels on, lowered to ground: give the brake pedal a few firm pushes (first push will likely have excessive travel cos you've pushed the pistons back in). then check your fluid level and refit the reservoir cap.
rear pads are different cos of different caliper design. you will need a piston rewind tool.
it's an opportunity to fit upgraded pads if you have the $$. perhaps Ferodo DS2500. do some research. DS Performance may suffice for your needs if you don't want to spend too much. depending upon the pads, they may require a specific bedding-in procedure, so refer to manufacturer recommendations.
as for discs, if the surface is very uneven, then replace them, or have them machined. but it depends on the remaining thickness. little bit more work to replace the discs. you'll need the right tools to remove the calipers and a torque wrench and threadlock to refit them. Torx-E bolt heads IIRC.
note: i've not changed pads on the Ti, but the calipers are virtually identical to the Brembos on my GT, which i've worked on. whether it's easy'ish depends on your experience, but it is one of the easier jobs.