1. Servicing - Fluids only? Plus the usual suspects, fig 8's, wheel bearings, filters, check your clips on all your hoses, ensure your battery is secure
2. Tyres - how long have they been on the car, any signs of wear, cracking? Consider slightly higher pressures for the higher speeds/cornering
3. Brakes - Plenty pad left, but would it be worth getting braided hoses to prevent fade? Yes to braided hoses, what fluid are you using? DOT 5.1?
4. Crash helmet - Depends if it MSA regs? You can get bike helmets for ~£40, worth it in the long run but do check to see if there are any restrictions for the track you visit otherwise you may need to acquire an MSA approved lid.
5. Exhaust - It's a mongoose cat-back. Check the spec of the exhaust and compare to the tracks limit, usually 95-96 dB but some are higher ~100
6. Insurance - If you can find a company offering track day insurance it is worth it for the peace of mind, imho. There are some options for covering 5 days per annum.
7. Will I need to tape up my headlights? Yes
8. Any other misc. advice to help out a novice like me? Take your time to 'learn' the track, build up from several slow sighting laps. Try to limit yourself to 5-6 laps before pitting to check over for any issues. This will also allow your brakes to cool if you have experienced any fading(do NOT apply the handbrake). It is worth chatting to someone who has driven the track previously, and maybe have a passenger ride to get ideas on lines. If there is the option of an instructor, they will be able to talk you through the track, can be expensive tho.
There should be a drivers briefing to take you through all the track regs and rules, e.g. overtaking etiquette, flags etc
If I think of anything else I'll add it

9. Most importantly of all: Enjoy the day
Cheers