A couple pointers...
- A cheap guitar is cheap for a reason, don't expect to get Rock God sound from it. This is because high quality guitars are made from solid wood with better electronics. Cheap models are made from plywood and thus don't have the warmth you may be expecting.
- I'd suggest an acoustic guitar for a beginner. You can always get an electric when you're a better musician and know a little bit more about guitars (see above statement)
- Have the shop you purchase it from show you how to maintain it also (string change, cleaning, tuning, etc...)
- A lot of manufactures have factory blemished models, the trick is finding an outlet that sells them. This can offer a free upgrade to a better quitar if you desire. You must examine the guitar beforehand.
- Purchase a good tuner. I recommend a Sabine tuner.
- First learn some chords, then practice simple transitions (A to E and back again), then download some tabs of your favorite music. This will help keep you interested.
- Start using medium strings (9's for elec, 12's for acoustic), and medium picks. You can always change later to a different style. (If you purchase an acoustic ONLY purchase Martin strings)
- Realize that 90% of guitar "gear" is a scam. It's gimmicky crap for unknowing consumers. Always research before you purchase something. I've seen entire guitar stores without a single "worth it" item.
Hope this helps a bit.