alrighty so i got 2 questions for yall. before you answer please know that i am completely knew to biking so forgive me for my lack of knowledge of this subject.

1. i know this is probably a stupid question but i thought id ask. on my trek 7.1 fx i notice the front wheel is not completely true and its been this way since i first bought it. is this normal with most bikes or is this a problem? could it be that the tire is on there wrong and it not be a problem of the rim?

2. my right knee hurts pretty bad after doing a 10 mile ride yesterday. i just came to visit my parents and thought i would bring my bike with me. around where they live have lots of hills and there are gravel roads and lots of bumps. this was probably one of my most challenging (but fun) rides and my knee started hurting after turning around and heading towards home. it was to the point that it hurt so bad to go up hills but i kept going until i came home. today the pain is still there only if i am going up stairs or standing up from sitting, other than that i cant feel it. the pain is only on the right knee on the upper right side. should i stop biking for a while and start again later or does this sound like i need to see a doctor? can this be fixed with proper bike adjustments like seat height? or am i just having horrible biking form that i caused the pain on myself?

any help would be appreciated. thanks for yalls time in reading this.