Day 1 of my first Porsche - noob looking for advice

[DG Boxster]

Hello all - we picked up our very 1st Porsche today, a 1998 Boxster with 70k. Black paint / Black interior. Runs and drives really well.

I had a pretty detailed pre-buy inspection at a local shop, and I'm hopeful this will be a pretty good intro for us. The car is very original.

Stuff to fix soon includes an oil / filter / air filter change followed by new front (and maybe rear) tires with an alignment. I am looking at Continental ExtremeContact DW tires (maybe).

The prebuy mechanic said the coils are original, but working... he said they tend to fail so I might replace them. I don't know about the plugs so I was thinking of doing those too. Should I replace the spark plug tubes? The Porsche brand grease listed for the spark plug tubes on pelican parts is $45, surely there is some equivalent?

Also the accessory belt is marginal. I'm planning on doing all of this myself over the next few weeks.

There are some oddities too. The key remote doesn't work (although it lights up). The horn doesn't work.

There are a couple of interior issues. There is supposed to be a drawer on the drivers side, in that box? Also the hinge on the center console is broken so you can just lift up the cover. Where does one get interior parts like these?

The owners manual talks about "treating" the top. What can I treat it with?

Thanks for any info,

dave gribble