everything will have to be soldered in. Either way if you decide to go LED or just replace the mini bulbs you'll have to desolder the old ones and solder in the new ones.

 

Will it matter which way I solder the bulbs? Or are they a specific way like the leds

 

the mini bulbs no, polarity doesn't matter-for LED's yes

 

One last question: where can I buy the oem bulbs, ill just replace all of them while I'm in there

 

it depends what bulbs you are replacing. They are all the same size (with the rare exception) but some have bases and some don't. You can reuse your bases but you'll have to get the new bulb into the old bases.

Just search on ebay, should be an easy find!